250-700 exam Dumps Source : Implementation of HA Solutions for Windows using VCS 4.1
Test Code : 250-700
Test name : Implementation of HA Solutions for Windows using VCS 4.1
Vendor name : Symantec
: 73 real Questions
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faced with diminishing returns from ransomware and cryptojacking, cyber criminals are doubling down on altenative strategies, equivalent to formjacking, to originate money in line with a preview of Symantec’s internet security risk file (ISTR), volume 24.
Symantec’s ISTR provides a top smooth view of the danger landscape, together with insights into global probability pastime, cyber crook traits, and motivations for attackers. The report analyzes facts from Symantec’s world Intelligence community, the largest civilian chance intelligence community on this planet, which statistics events from 123 million assault sensors worldwide, blocks 142 million threats day by day and monitors possibility activities in more than 157 international locations. Key highlights from this 12 months’s report include:Formjacking is the modern derive rich quick Scheme for Cyber Criminals
Formjacking attacks are yardstick – just about digital ATM skimming – where cyber criminals inject malicious code into retailers’ websites to hook customers’ payment card details. On standard, more than 4,800 enjoyable websites are compromised with formjacking code each month globally. Symantec blocked greater than three.7 million formjacking assaults on endpoints in 2018, with very nearly a 3rd of everyone detections happening throughout the busiest on-line searching length of the yr – November and December.
whereas a number of generic sellers’ on-line imbue web sites, including Ticketmaster and British Airways, had been compromised with formjacking code in recent months, Symantec’s analysis reveals wee and medium-measurement sellers are, by in tremendous, the most widely compromised.
via conservative estimates, cyber criminals might also tolerate accumulated tens of millions of bucks ultimate yr, stealing patrons’ monetary and personal suggestions via credit card fraud and sales on the murky web, with a lone credit card fetching up to $45 in the underground promoting boards. With greater than 380,000 credit score cards stolen, the British Airways beset lonely may additionally tolerate allowed criminals to internet more than $17 million.
“Formjacking represents a significant risk for each businesses and patrons,” spoke of Greg Clark, CEO, Symantec. “buyers don't tolerate any means to understand if they are traveling an contaminated online retailer without using a complete protection solution, leaving their useful own and economic counsel at risk of doubtlessly devastating identification theft. For companies, the skyrocketing raise in formjacking displays the transforming into risk of provide chain assaults, now not to mention the reputational and legal responsibility hazards organizations visage when compromised.”The Diminishing Returns of Cryptojacking and Ransomware
In fresh years, ransomware and cryptojacking, where cyber criminals harness stolen processing power and cloud CPU usage from buyers and firms to mine cryptocurrency, tolerate been the go-to strategies for cyber criminals looking to originate convenient money. however, 2018 brought drop-offs in activity and diminishing returns, basically because of declining cryptocurrency values and extending adoption of cloud and cellular computing, rendering assaults less constructive. For the primary time given that 2013, ransomware infections declined, dropping through 20 p.c. nevertheless, enterprises may quiet not let their shield down – commercial enterprise ransomware infections jumped via 12 % in 2018 as compared to closing yr, bucking the universal downward trend and demonstrating ransomware’s ongoing chance to companies. basically, greater than eight in ten ransomware infections impress agencies.
although cryptojacking undertaking peaked early final year, cryptojacking exercise declined by using fifty two p.c everyone through the route of 2018. Even with cryptocurrency values shedding by using 90 % and greatly cutting back profitability, cryptojacking however continues to hold appeal with attackers because of the low barrier of entry, minimal overhead, and anonymity it offers. India ranks fourth globally, 2nd in APJ when it comes to crypto mining activities. similarly, India ranks 2d both globally and in APJ when it comes to ransomware actions. Symantec blocked three.5 million cryptojacking routine on endpoints in December 2018 on my own.When it involves protection, the Cloud Is the brand modern notebook
The identical security mistakes that were made on PCs everyone through their prefatory adoption by means of the traffic at the minute are occurring in the cloud. A lone misconfigured cloud workload or storage instance could can imbue a corporation tens of millions of greenbacks or land it in a compliance nightmare. during the past year alone, more than 70 million records had been stolen or leaked from poorly configured S3 buckets. There are also numerous, easily-obtainable gear that permit attackers to identify misconfigured cloud resources on the cyber web.
The coincident discoveries of hardware chip vulnerabilities, together with Meltdown, Spectre, and Foreshadow additionally dwelling cloud functions at risk of being exploited to gain access to the included memory spaces of other companies’ components hosted on the identical actual server.dwelling Off the Land gear and provide Chain Weaknesses Spur Stealthier, more formidable attacks
supply chain and dwelling off the land (LotL) assaults are actually a mainstay of the up to date possibility panorama, widely adopted by each cyber criminals and focused assault groups. in reality, supply chain attacks ballooned by seventy eight percent in 2018.
LotL thoughts allow attackers to maintain a low profile and mask their recreation in a mass of respectable processes. as an example, using malicious PowerShell scripts increased by using 1,000 % closing yr. while Symantec blocks 115,000 malicious PowerShell scripts each month, this definitely accounts for less than one % of universal PowerShell usage. A sledgehammer approach towards blockading everyone PowerShell undertaking can live disruptive to groups, extra illustrating why LotL concepts tolerate gyrate into the favored tactic for a lot of centered assault groups.
picking out and blocking off these assaults requires using advanced detection methods relish analytics and machine getting to know, corresponding to Symantec’s Managed Endpoint Detection and Response (MEDR) provider, its greater EDR 4.0 know-how, in addition to its superior AI answer, focused beset Analytics (TAA). TAA has allowed Symantec to learn dozens of stealthy focused attacks, including these from the Gallmaker community who conducted their cyber espionage campaigns fully with out malware.
in addition to LotL and weaknesses in the utility provide chain, attackers are additionally increasing their employ of close beset strategies, relish spear-phishing, to infiltrate companies. whereas intelligence gathering is quiet the basic intuition of centered assaults, the variety of assault companies the employ of malware designed to smash and disrupt company operations multiplied by 25 percent in 2018.information superhighway of issues in the Crosshairs of Cyber Criminals and beset corporations
while the quantity of information superhighway of issues (IoT) attacks continues to live excessive and consistent with 2017 ranges, the profile of IoT attacks is altering dramatically. however routers and connected cameras originate up the biggest percentage of contaminated contraptions (90 percent), very nearly each IoT gadget has been proven vulnerable, with every thing from smart mild bulbs to voice assistants growing additional entry features for attackers.
centered assault organizations are increasingly specializing in IoT as a key entry factor. The emergence of the VPNFilter router malware represents an evolution in common IoT threats. Conceived by a talented and well-resourced possibility actor, it permits its creators to smash or wipe a device, hook credentials and statistics, and intercept SCADA communications.
“With an increasing trend in opposition t the convergence of IT and industrial IoT, the next cyber battlefield is operational technology,” talked about Ajathashatru Varma, Director, Symantec Cyber protection services, India. “A becoming variety of agencies, similar to Thrip and Triton, display pastime in compromising operational systems and industrial maneuver programs to probably dwelling together for cyber conflict.”The brilliant privacy Awakening
With the coincident Cambridge Analytica facts scandal and the facebook records privateness hearings, the implementation of the regular information privateness regulation (GDPR), and revelations about app region tracking and privacy bugs in extensively-used apps similar to Apple’s FaceTime function, consumer privateness has entered the spotlight the past year.
smart telephones could arguably live the superior spying gadget ever created – a digital camera, a listening gadget and placement tracker multi functional that's willingly carried and used anyplace its proprietor goes. while already focused by using nation-states for common spying, sensible telephones tolerate also develop into a lucrative skill during which to assemble patrons’ own information, with cellular app builders existing because the worst offenders. India is among the top countries for cellular malware with 23.6 percent of global infections.
in response to Symantec analysis, 45 percent of probably the most customary Android apps and 25 p.c of probably the most universal iOS apps request region monitoring, forty six percent of commonplace Android apps and 24 % of commonplace iOS apps request consent to entry your equipment’s digicam, and e mail addresses are shared with 44 percent of the accurate Android apps and 48 p.c of probably the most generic iOS apps.
Digital gear that collect cell facts for tracking infants, pals, or misplaced telephones are additionally on the upward propel and clearing the style for abuse to track others with out consent. more than 200 apps and features present stalkers a lot of capabilities, including primary region tracking, textual content harvesting, and even secret video recording.
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"access to clear drinking water is the most threatened privilege of Caribbean individuals," says Zachary Harding, CEO of Hyperion equity, the inner most fairness enterprise that manages the Caribbean local weather Fund. The Caribbean climate Fund changed into centered by means of Harding's Hyperion fairness after completing his shrink as CEO of the Caribbean climate sensible Accelerator, which is now hasten by using their these days appointed CEO, Racquel Moses from Trinidad.
Harding, in his former publish with the Accelerator, facilitated the implementation of a water harvesting expertise that has simply taken a Jamaican tiny ones’s hospital off the water grid. here is a large success within the local context, where one in 4 americans (always among the poorest 20%) will not tolerate domestic access to piped water, and droughts and infrastructural issues outcomes in periodic “lock-offs” for the the rest of the population.
for many small island setting up states of the Caribbean, the dwelling climate exchange-connected pressures, equivalent to drought and stern climate, compound geographic, industrial and infrastructural issues—water shortage is a artery of life.
to position the condition in context, Barbados, given its lack of cleanly water supplies, has a water availability of simply 306 cubic meters per capita per year, which makes it the fifteenth most water‐scarce nation on the planet. Jamaica has suffered from an growing extinct and overburdened water gadget with tens of hundreds of reported leaks per year, and in Dominica, water carrier was no longer restored to many areas except mid-2018— greater than half a 12 months after hurricane Maria devastated the island. These are individual examples however the issues pervade the vicinity.
In 2017, the Caribbean Drought and Precipitation Monitoring network (CDPN) and personnel at the St. Lucia-based mostly Caribbean Environmental fitness Institute (now replaced by means of the Caribbean Public fitness company or CARPHA) warned that within the years to come, the eastern Caribbean might discern declines in daily annual rainfall between 30-50%. similtaneously, the region is experiencing the rapid depletion of cleanly water aquifers, a ascend in saline and tenacious water and the pollution of groundwater elements. These land and water-based issues Do not even commence to tolerate in intelligence sober socio-financial and political deterrents to cleanly water availability.
It is not astonishing that, of the 37 international locations that the world supplies Institute has recognized as having “extraordinarily high” stages of water stress, seven are from the Caribbean: Dominica, Jamaica, St. Vincent and the Grenadines, Trinidad and Tobago, Antigua and Barbuda, Barbados and St. Kitts and Nevis, with the latter three being specific as water scarce (under 1,000 meters cubed of freshwater substances per capita).
“The paradigm of publicly offered water, originating generally from usual sources and processed through energy-intensive applied sciences will develop into much less and less possible,” says Harding. “every endeavor should live made to hold the water provide chain off the grid and ‘out the box.’”
during the terminal half a decade, countrywide governments tolerate invested in infrastructure upgrades and implementations, together with mains substitute, water medication flowers and leakage reduction initiatives, each with restricted levels of success, typically because of fiscal and logistical difficulties, inferior design and pile and incompatible and short sighted planning that has neglected the trial of long hasten maintenance.
at present, the conception of converting wastewater into drinking water is nothing more than a pipe dream—pun meant. in keeping with the Caribbean Regional Fund for Wastewater administration, up to eighty five% of wastewater across the Caribbean is untreated. lower than 17% of Caribbean buildings are even related to a public sewage equipment. The fiscal implications of one of these venture are leviathan.
Desalination, the routine of extracting cleanly water from seawater, makes employ of what would materialize to live a bountiful useful resource in the Caribbean.
during the terminal decade, 68 modern desalination vegetation tolerate been built throughout the area, with a skill of 782,000 cubic meters of purified water per day (Caribbean Desalination association). Nevis’ Premier ticket Brantley lately introduced that the govt of the United Arab Emirates would launch a $50 million greenback solar-powered desalination venture in St. Kitts and Nevis, throughout the primary half of 2019.
Desalination isn’t with out its challenges, however. A coincident UN-backed examine discovered that environmental hazards related to desalination flowers are higher than initially idea; the most obvious of which relate to large amounts of energy consumption and harm to marine ecosystems as well as during the construction of pestilent by means of-products, comparable to brine, that are pumped again into the ocean.
Atmospheric water era (AWG), a procedure that extracts, filters, sterilizes and stores water without detain from vapor that exists within the air, offers a greater environmentally sustainable option to desalination and has generated a pleasant deal of buzz in scientific and water circles certainly with respect to programs that are fueled by using solar energy.
As improvements continue to maneuver the rigor of water scarcity, old-fashioned and obsolete water management systems will live replaced and altenative sources discovered. The monetary and logistical trial of implementation and upkeep will should live shared between countrywide governments and the deepest sector, with an empowered network of conclusion-users who're plugged in by means of clear and decentralized monitoring methods so that they too can gyrate into fraction of the answer.
local weather exchange-related challenges corresponding to floods, sea smooth upward push, drought and extreme weather are the brand modern norm for the Caribbean. Given the complexity of compounding political, economic and environmental considerations, regional collaboration is required to find a sustainable retort to a “global water crisis” a pleasant artery to tolerate an repercussion on over 1.8 billion individuals via 2025.
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Configuring application servers may not live as trifling as it seems. There are some configuration commands and parameters that may not travail as the users intuit. To originate matters worse, configuring clusters not only involves tuning parameters, but also requires you to deal with the availability of servers, SSH configurations, operating application server in everyone nodes, etc. Thus below we’ll interpret how to easily create a GlassFish cluster with Docker and Jelastic using solutions such as CloudScript.
For this sample guide, we’ve chosen Oracle GlassFish application server, as it offers reference implementation of Java EE 7 and has a centralized artery to operate clusters, applications, and configurations without the necessity to manage every cluster node. According to the official GlassFish documentation, administration node has the following architecture:
In the picture above, the Domain Administration Server (DAS) is the administration node of a cluster, which can communicate between cluster nodes by DCOM (in case of GlassFish clusters in Windows nodes) or by SSH (in case of Linux-, Solaris- and macOS-based cluster nodes). Also, there exists the third option, named CONFIG, intended to manage each node locally. In order to centralize the administration, GlassFish Docker image is using SSH for communication between DAS and other GlassFish worker nodes. Now, let’s recite how the Docker images were prepared.Docker Images
For this demo, we’ll employ two Docker images:
The identical GlassFish Docker image can result in containers performing both DAS and cluster node roles. What makes it practicable are several customizations made in the Docker image, originally created by Bruno Borges from his GlassFish 4.1.1 image. So, they customized the images to poke away from Oracle Linux to Debian, add the OpenSSH install step, and define several configurations in the image provisioning and start up processes.
The containers exigency to communicate between them through SSH, so installing an SSH server is mandatory (we’ve used OpenSSH in this case). Additionally, the entries PubkeyAuthentication, StrictModes, AuthorizedKeysFile, PermitRootLogin, and IdentityFile in /etc/ssh/sshd_config had to live properly set. Moreover, the SSH keys are scanned during startup process to avoid SSH getting stuck due to the key’s fingerprint acceptance, by ssh-keyscan doing it for us. Once the SSH was properly configured, they are able to automate cluster configuration.
Cluster configuration in GlassFish 4.1.1 is not a trifling stint to automate, requiring some smooth of expertise. This Docker image can travail as a DAS by setting -e ‘DAS=true’ in the Docker hasten command. If a container is hasten with this parameter set, it will start the domain, create a cluster named cluster1, halt the domain, and start it again with -v parameter. If a GlassFish container has a DAS container linked, it assumes itself as a cluster node, creates a cluster node by using asadmin create-local-instance command, stops the domain, updates the node definitions by using the command asadmin update-node-ssh from the DAS node in order for the DAS node to metamorphose the callee into a SSH cluster node, and finally starts the instance by using nadmin start-instance command. For a better understanding, gratify read the run.sh source code in the GlassFish Docker image repository.
Jelastic offers a HAProxy Docker image ready to live used in Jelastic environments. Containers from jelastic/haproxy-managed-lb Docker image can add or remove nodes from the load balancer configuration by running the shell script /root/lb_manager.sh inside the container, with one of the following parameters:
For this demo, they used Jelastic as a Docker infrastructure and they created a CloudScript of this demo, in this repository. They also used the clusterjsp.ear application to test whether the cluster and the load balancer were working as expected.
In this CloudScript, they can notice that there are two events to update the load balancer’s configuration — onAfterScaleOut and onAfterScaleIn — and one event to update the cluster — onBeforeScaleIn. In the case of an onAfterScaleOut event, a procedure is called to add the nodes to the load balancer, using the script inside HAProxy container. The event onAfterScaleIn just calls the /root/lb_manager.sh directly inside a for loop, and passing everyone the nodes from event.response.nodes. In the case of an onBeforeScaleIn event, a procedure is called to remove GlassFish nodes from the cluster.
Now, as you tolerate a better understanding of the proposed JSON file, let’s import it in Jelastic to create an environment. You can access the GlassFish DAS administration console by getting the HTTP URL for it — you can obtain it by clicking on ‘Open in browser’ button at the privilege of the das node name — and accessing it using HTTPS and in the port 4848. To test whether the load balancer works, deploy the clusterjsp application in cluster1 and set the Availability option. Accessing the load balancer container URL, you may discern a GlassFish web page indicating that it is running. Set the context of the deployed application and you’ll access the application. After one or two page reloads, you’ll discern that the node accessed varies.Create Clustered Environment
You can import the environment by following the steps below:
1. Access Jelastic console and click Import.
2. Select the URL tab and set this URL from the cluster JSON.
3. Set the name for the environment and click Install.
4. Finally, as they can see, the cluster was created.Deploy and Configure Application
After creating the cluster, they can deploy an application to the cluster and declar that the cluster is working correctly and the load balancer is operating as it should.
1. At the GlassFish das node row, click the button Open in browser located at the privilege of node’s name.
2. Once the browser window is open, it shows the default GlassFish web page. Change the URL browser to https://<environment_domain>:4848.
3. Enter the GlassFish console with the user admin and password glassfish.
4. poke to the Application option and deploy the clusterjsp.ear application:
5. Now open the HAproxy node in browser and add /clusterjsp at the quit of the URL.
Every time you refresh the page, the executed server IP address changes, indicating that the load balancer is working.Conclusion and Future Works
Docker images and scripting Do a noteworthy job at automating environment creation together. Docker containers from images, which hasten in Jelastic the identical artery they hasten in any other infrastructure, and scripting, to capture the amend topology of the servers involved in the environment, are the bread and butter of any Docker environment that can live used in Jelastic infrastructure. They profit from its advantages in terms of resource management and are able to migrate from other platforms to Jelastic and migrate away if needed.
Hardware, although often an afterthought in an SAP project, is an essential component of an SAP system. Hardware comprises the servers (think “data heart computers”), disk storage systems, network gear (such as routers, network switches, and security firewalls), and tape backup units everyone working together to create the infrastructure or groundwork layer of an SAP system. If any one piece is overlooked or skimped on, it creates a feeble link or lone point of failure that may occasions something down the road as simple as a one-time nagging glitch or as major as a chain of significant system outages, costing your company precious dollars. When hardware purchases are addressed late in an implementation, inevitable budget cuts (yes, implementing SAP tends to live more expensive than most companies evaluate up front) often restrict purchasing what could tolerate been a robust and highly available system. promote planning will wait on you avoid this problem when designing the overall solution.
The major players in the SAP hardware marketplace sell systems that fitting everyone types of solution needs, from small/medium user platforms reflecting commodity solutions and low cost, to larger and highly resilient platforms capable of scaling on the sail to meet the changing or growing needs of thousands of users. Choosing a partner simply based on name recognition is a pleasant dwelling to start, to live sure. However, hold supervision to investigate and compare hardware solutions from competitors that are truly apples-to-apples solutions. A million-dollar commodity hardware solution might support the identical workload as a high-end proprietary system costing twice as much, but Do they offer the identical levels of availability, scalability, and flexibility your traffic needs to survive month-end closing? By the identical token, will saving a few dollars on hardware (or database software, for that matter) require the IT department to disburse more money every year on systems management, maintenance activities, and downtime for upgrades and patches?Server Hardware
We view server hardware as coming in three main initial acquisition “cost” classes or performance categories: wee or low, medium, and high (see design 4.1). Costs per server can compass from a few thousand dollars to several million. Performance can vary as well, depending on the number of CPUs, amount of RAM, internal server architecture factors, support for high-speed disk operations, and much more. Different hardware platforms are developed to support various operating systems and levels of system availability. They disagree in terms of configuration flexibility and on-the-fly adaptability too.
Figure 4.1 Servers for SAP promote in a variety of sizes and configurations.
Interestingly, a lone SAP solution may utilize servers from one, two, or everyone three categories. For instance, SAP solutions are commonly designed to leverage a high-end server for the database tier, a mid-tier server platform for the SAP central instance or applications servers, and perhaps very inexpensive servers to address web server needs, noncritical bolt-on solutions, and so on. Conversely, other SAP IT departments might choose to dwelling everyone their SAP components on only a few high-end servers that can live carved up into partitions or virtual machines as necessary. And some small/medium businesses (SMBs) may choose to hasten SAP solely on low-cost servers (relying on SAP’s built-in application server horizontal scalability to support them out of pain should their workload grow). In any case, overall system availability, a comprehensive total cost of ownership analysis (reflecting technology, people, and process costs over time as well as up front), and anticipated future traffic requirements should drive your hardware platform decision.
Several of the largest and certainly best-known hardware vendors employ proprietary CPU chips in their servers and support a proprietary OS as well. IBM’s PowerPC chip running AIX is a pleasant example, as are HP’s end-of-life PA-RISC and more coincident Itanium2-based IA64 platforms running HP-UX. live certain to investigate your platform’s capacity to host other operating systems as well; this can live profitable down the road when you exigency to retire your SAP system and search to redeploy it internally rather than toss it in the dumpster. HP’s IA64 chips support Windows, Linux, and OpenVMS, for example, whereas Sun’s latest offerings support Solaris, Windows, and Linux.
Clearly the trend of late is around deploying low-cost servers based on commodity CPU chips from Intel and AMD (often referred to generically as “x64” platforms). HP and Dell are the biggest players in this market, though Sun offers a bit of altenative here as well. Interestingly, these platforms are growing more and more powerful each year, supplanting some of the bigger server platforms in the process. Commodity server configuration factors continue to expand and provide IT departments with choice—from dense blades to slim-line “pizza box” designs to more traditional big-box designs. Meanwhile, hardware vendors in this space continue to develop high-availability, virtualization, and other technologies and solutions that wait on dwelling these servers on more of an equal footing with their proprietary counterparts. In everyone the excitement and hype surrounding these well-performing upstarts, though, hold supervision not to overlook trade offs. Low cost up front doesn’t always translate to low cost over a system’s lifetime, for example.
When purchasing servers and associated hardware for SAP, reckon investing in the high-availability features offered for the platform, even if an additional imbue is involved. Most servers offer redundant power supplies, redundant memory, disk array (RAID) controllers capable of running even after a disk drive fails, and support for multiple network interfaces cards (NICs) to avoid failure of a network segment, network switch, or lone card. Leveraging these technologies will certainly enlarge the overall uptime of your SAP solution, typically adding only incremental cost in the process.
Server networks should live configured in a redundant vogue as well. In many IT data centers, the network represents a major—and avoidable—single point of failure. Dual switches and the employ of the aforementioned redundant NICs can eradicate or mitigate what otherwise could live a major outage. Of course, these NICs and switches must live properly and professionally installed, cabled, and configured to actually travail well; attention to high availability is just as primary after the purchase as beforehand.Disk Subsystem Hardware
Most server hardware vendors also sell disk subsystems, which are essentially enclosures for multiple disk drives used by SAP and other applications to house the application’s database, its installation binaries or executables, and so on.
The most robust and well-performing disk subsystems today are in the configuration of storage region networks (SANs) and to a lesser extent network-attached storage (NAS) systems. Similar to how servers are marketed, vendors sell low-tier, mid-tier, and high-end SANs and NAS devices. At a minimum, the storage chosen for SAP should support redundant connectivity between the storage and the servers connected to it, so as to avoid a lone point of failure. RAID (Redundant Array of Inexpensive Disks) smooth 0, 1, 5, or 10 should live configured as well to protect against disk failures. As Table 4.1 suggests, different RAID levels provide various combinations of availability, cost, and performance.Table 4.1. Disk Subsystem RAID Types, Advantages, and Disadvantages
Method of Availability
Advantages and Disadvantages
Spans multiple disks, everyone of which are available for storage. RAID 0 is noteworthy when maximum space is needed, and it provides excellent performance as well. However, no disk redundancy is afforded, and it’s not viable for production systems.
Mirroring provides best-in-class performance and excellent redundancy, although it’s costly (a 500GB database requires a terabyte of raw disk capacity at minimum).
Disk striping with parity
Stripes data with parity, making for wonderful disk read performance, though to some extent a disk write penalty; excellent redundancy balanced by best-in-class low cost.
Disk mirroring and striping
Data is both striped and mirrored; best performance and redundancy, although this is the most costly routine of providing disk subsystem availability.
High-end SAN storage typically supports advanced replication technologies, too, which can live useful for cataclysm recovery purposes among other things. live certain to gape into such capabilities—the capacity to copy data between remotely connected SANs or to create “snapshots” of SAP databases on the sail is useful in many different ways, from enabling rapid system backups, to allowing systems to live cloned for offline testing and training, to supporting cataclysm and traffic continuity requirements in the wake of a stern data heart outage.
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