Working on the new Dell EMC Ready Solution for SQL Server was like going from 0 to 60 mph in under 3 seconds. The exhilaration of being pushed into the seat as the road roars past in a blur is absolute fun. That’s what the combination of Dell EMC PowerEdge R840 servers and the new Dell EMC XtremIO X2 storage array did for us in our recent tests.The classic challenge with most database infrastructures is diminishing performance over time. To use an analogy, it’s like gradually increasing the load a supercar must pull until its 0-to-60 time just isn’t impressive anymore. In the case of databases, the load is input/output operations per second (IOPS). As IOPS increase, response times can slow and database performance suffers. What is interesting is how this performance problem happens over time. As more databases are gradually added to an infrastructure, response times slow by a fraction at a time. These incremental hits on performance can condition application users to accept slower performance—until one day someone says, “Performance was good two years ago but today it’s slow.”When reading about supercars, we usually learn about their 0-to-60 mph time and their top speed. While the top speed is interesting, how many supercars have you seen race by at 200+ mph? Top speeds apply to databases too. Perhaps you have read a third-party study that devoted a massive hardware infrastructure to one database, thereby showing big performance numbers. If only we had the budget to do that for all our databases, right? Top speeds are fun, but scalability is more realistic as most infrastructures will be required to support multiple databases.Dell EMC Labs took the performance scalability approach in testing the new SQL Server architecture. Our goals were aggressive: Run 8 virtualized databases per server for a total of 16 databases running in parallel, with a focus on generating significant load while maintaining fast response times. To make the scalability tests more interesting, 8 virtualized databases used Windows Server Datacenter on one server and the other 8 databases used Red Hat Enterprise Linux on another server. Figure 1 shows the two PowerEdge R840 servers and the 8-to-1 consolidation ratio (on each server) achieved in the tests.Figure 1: PowerEdge R840 serversQuest Benchmark Factory was used to create the same TPC-E OLTP workload across all 16 virtualized databases. On the storage side, XtremIO X2 was used to accelerate all database I/O. The XtremIO X2 configuration included two X-Brick modules, each with 36 flash drives for a total of 72. According to the XtremIO X2 specification sheet, a 72-drive configuration can achieve 220,000 IOPS at .5 milliseconds (ms) of latency with a mixture of 70 percent reads and 30 percent writes using 8K blocks. Figure 2 shows the two X-Brick configuration of the X2 array with some of key features that make the all-flash system ideal for SQL Server databases.Figure 2: XtremIO X2Before we review the performance findings, let’s talk about IOPS and latency. IOPS is a measure that defines the load on a storage system. This measurement has greater context if we understand the maximum recommended IOPS for a storage system for a specific configuration. For example, 16 databases running in parallel don’t represent a significant load if they are only generating 20,000 IOPS. However, if the same databases generated 200,000 IOPS, as they did on the XtremIO X2 array that we used in our tests, then that’s a significant workload. Thus, IOPS are important in understanding the load on a storage system.Response time and latency are used interchangeably in this blog and refer to the amount of time used to respond to a request to read or write data. Latency is our 0-to-60 metric that tells us how fast the storage system responds to a request. Just like with supercars, the lower the time, the faster the car and the storage system. Our goal was to determine if average read and write latencies remained under .5 ms.Looking at IOPS and latency together brings us to our overall test objective. Can this SQL Server solution remain fast (low latency) under a heavy IOPS load? To answer this question is to understand if the database solution can scale. Scalability is the capability of the database infrastructure to handle increased workload with minimal impact to performance. The greater the scalability of the database solution, the more workload it can support and the greater return on investment it provides to customers. So, for our tests to be meaningful we must show a significant load; otherwise, the database system has not been challenged in terms of scalability.We broke the achievable IOPS barrier of 220,000 IOPS by more than 55,000 IOPS! In large part, the PowerEdge R840 servers enabled the SQL Server databases to really push the OLTP workload to the XtremIO X2 array. We were able to simulate overloading the system by placing a load that is greater than recommended. In one respect we were impressed that XtremIO X2 supported more than 275,000 IOPS, but then we were concerned that there might have been a trade-off with performance.The average latency for all physical reads and writes was under .5 ms. So not only did the SQL Server solution generate a large database workload, the XtremIO X2 storage system maintained consistently fast latencies throughout the tests. The test results show that this database solution was designed for performance scalability: The system maintained performance under a large workload across 16 databases. Figure 3 summarizes the test findings.Figure 3: Summary of test findingsThe capability to scale without having to invest in more infrastructure provides greater value to customers. Would I recommend pushing the new SQL Server solution past its limits like Dell EMC Labs did in testing for scalability? No. Running database tests involves achieving a steady state of performance that is uncharacteristic of real-world production databases. Production databases have peak processing times that must be planned for so that the business does not experience any performance issues. Dell EMC has SQL Server experts that can design the Ready Solution for different workloads. In my opinion, one of the key strengths of this solution is that each physical component can be sized to address database requirements. For example, the number of servers might need to be increased, but no additional investment is necessary on XtremIO X2, thus, saving the business money.If I were to address just one other topic, I would pick the space savings achieved with a 1 TB SQL Server database. In figure 4, test results show a 3.52-to-1 data reduction ratio, which translates to a 71.5 percent space savings for a 1 TB database on the XtremIO X2 array. Always-on inline data reduction saves space by writing only unique blocks and then compressing those blocks to storage. The value of inline data reduction is the resulting ability to consolidate more databases to the XtremIO X2 array.Figure 4: XtremIO X2 inline data reductionAre you interested in learning how SQL Server performed on Windows Server Datacenter edition and Red Hat Enterprise Linux Server? I recommend reading the design guide for Dell EMC XtremIO X2 with PowerEdge R840 servers. The validation and use case section of that guide takes the reader through all the performance findings. Or schedule a meeting with your local Microsoft expert at Dell EMC to explore the solution.Why Ready Solutions for Microsoft SQL?The Ready Solutions for Microsoft SQL Server team at Dell EMC is a group of SQL Server experts who are passionate about building database solutions. All of our solutions are fully integrated, validated, and tested. Figure 5 shows how we approach developing database solutions. Many of us have been on the customer or consulting side of the business, and these priorities reflect our passion to develop specialized database solutions that are faster and more reliable.Figure 5: Our database solutions development approachI hope you enjoyed this blog. If you have any questions, please contact me.Additional Resources:Microsoft SQL Server Info Hub—A list of recent Dell EMC solutions for SQL ServerDell EMC Ready Solutions for Microsoft SQL—A good resource for all Dell EMC solutions for SQL Server
More than four million coronavirus cases have been recorded in Latin America and the Caribbean, half of them in Brazil, according to an AFP tally based on official figures.The region passed the bleak milestone as Brazil reported a daily record of 67,860 new coronavirus cases Wednesday.Latin America is one of the hardest-hit regions in the world, with 4,040,925 recorded cases and 172,886 people killed by COVID-19. Mexico’s death toll has surged to become the fourth-highest in the world, at 40,400.The country surpassed Italy on Sunday, and now has more victims than anywhere but the United States, Brazil and Britain.Worldwide, the virus has infected more than 15 million people and killed nearly 625,000 since it emerged in China late last year.Brazil in particular has struggled to set a strategy for responding to the pandemic.President Jair Bolsonaro faces criticism for downplaying the virus and attacking social distancing measures adopted by state and local authorities.The far-right leader, who has regularly hit the streets mask-less for rallies by his supporters, has been in quarantine at the presidential palace since July 7 after contracting the virus himself.His office announced Wednesday he had again tested positive, saying he would continue his quarantine and suspend his upcoming travel plans.Bolsonaro, 65, argues the economic fallout from stay-at-home measures could be worse than the virus itself, and is instead pushing the unproven malaria drugs chloroquine and hydroxychloroquine as remedies, following in the footsteps of US President Donald Trump.Margareth Dalcomo, an expert at Brazil’s leading public-health institute, Fiocruz, said Bolsonaro’s hydroxychloroquine-pushing was “deplorable.””This politicization of the drug by the US and Brazilian presidents for murky reasons has no justification, and it deceives people,” she told AFP.”It has been proven this drug has no effect against COVID-19.”Bolsonaro is on his third health minister since the pandemic reached Brazil five months ago, after falling out with two doctors who previously held the post over their recommendations on containing the virus.The current minister, an interim, is Eduardo Pazuello, an army general with no prior medical experience.The World Health Organization voiced optimism last week that the outbreak in Brazil had finally reached a plateau, urging the country to use the opportunity to “take control.”But though the level of daily infections and deaths has stabilized, it remains high.The country has recorded an average of more than 37,000 infections and 1,050 deaths a day over the past week. Topics : That is the highest caseload of any region except North America, and the highest death toll of any region except Europe.Brazil alone has registered 2.2 million cases and 82,771 deaths, the second-biggest outbreak in the world after the United States.Although many Latin American countries have begun relaxing stay-at-home measures, the virus is still spreading quickly across much of the region.Peru, Mexico and Chile are also on the list of the top 10 countries by total cases, with well over 300,000 each.
FIFA says the referee who awarded Italy a goal after first whistling for a penalty in Saturday’s match against Brazil acknowledges making the wrong call.Referee Ravshan Irmatov blew his whistle to award Italy a penalty. Moments later, as play continued, Giorgio Chiellini scored. Irmatov was seen pointing at the penalty spot and then giving a goal.FIFA spokesman Pekka Odriozola said: “He has admitted he made a mistake.”Irmatov is a widely respected referee from Uzbekistan who had been expected to have a chance to referee the Confederations Cup final. Now he is expected to be sent home with his assistants, who also made two key errors in Saturday’s game.Brazil won the match 4-2.
“They tried this last year,” said Mattel spokeswoman Lauren Dougherty, “but Barbie is still the number one fashion theme doll for the year in the United States and worldwide.” So who is the real princess? Neither, according to Alison Marek, the managing editor of TD monthly, a specialty toy trade magazine. “As far as (my readers) are concerned, neither Bratz or Barbie is the number one doll because they don’t want their kids playing with them,” she said. “A lot of parents would prefer that their kids find something that reflects their own peer group.” But the competition is healthy. “If somebody is breathing down your neck,” Marek said, “you need to think of the next thing.” [email protected] (818) 713-3735 160Want local news?Sign up for the Localist and stay informed Something went wrong. Please try again.subscribeCongratulations! You’re all set! Let the catfight begin. If the toy industry is one big popularity contest, Barbie and Bratz are wrestling over the queen’s crown. Both claimed Monday to be the fashionable doll that has won the hearts – and purses – of little girls. The dueling claims are the latest in a drawn-out battle between the two doll makers that has included lawsuits, counter-lawsuits and backhanded gossip about the dolls. Both Mattel, which makes Barbie, and MGA Entertainment, which makes Bratz, can say they are number one by touting different statistics from the NPD Group, a market research firm. If you look at sales from the last three months of 2006 in the United States, Bratz reigns. After trailing in Barbie’s taller, thinner shadow for years, Bratz elbowed Barbie out of the way with 34 percent of sales in the fourth quarter, said Isaac Larian, head of MGA in Van Nuys. Mattel declined to disclose Barbie’s market share for the same period. “For the whole year they were just a little bit higher than us,” Larian said. “For the past seven years we have not been able to beat them. But we finally beat them.” Larian expects Bratz’s lead to last because January sales of the dolls increased by double digits. But Bratz’s lead disappears if you step back and examine sales from the entire year. Then, Barbie is the favorite.