tag:blogger.com,1999:blog-22921684.post829626528262097386..comments2023-05-12T08:13:38.639+01:00Comments on The Storage Architect: Pillar CrumblesChris M Evanshttp://www.blogger.com/profile/05633427140097100466noreply@blogger.comBlogger2125tag:blogger.com,1999:blog-22921684.post-9303640903197644412008-11-03T15:41:00.000+00:002008-11-03T15:41:00.000+00:00Jim, I guess the SSD/SATA performance issue is a s...Jim, I guess the SSD/SATA performance issue is a subjective one - it depends where/how the data is distributed. Yes, it could be a problem, but on the other hand it might not, if Compellent's algorithms are efficient enough. I'm just speculating this as I don't have any in-depth knowledge of the product (which is always dangerous). <BR/><BR/>Happy to take you up on your offer of a briefing - it would be good to add Pillar into the details I'm putting together on different array technologies.Chris M Evanshttps://www.blogger.com/profile/05633427140097100466noreply@blogger.comtag:blogger.com,1999:blog-22921684.post-23892409793483112512008-10-31T19:41:00.000+00:002008-10-31T19:41:00.000+00:00Pillar’s QoS involves MUCH more than “tiering data...Pillar’s QoS involves MUCH more than “tiering data on the disk”. While it’s true that Pillar will place data on certain areas of a platter to optimize the performance, the true performance gains come from the caching and queuing algorithms implemented in the Slammers. Pillar believes that not all applications are created equally so all their IO’s should not be treated equally. By using QoS, combined with the Axiom’s distributed RAID technology, Pillar is able to guarantee that applications with higher priorities will have the performance they need. As capacity is added and new applications are brought online Pillar can accurately predict the impact of those new IO’s and capacity to the overall performance of the system. QoS is far more than tiering data on the disk.<BR/> <BR/>As for Compellent, sure, SSD is fast but what happens when random parts of your data are scattered across SSD, FC and SATA drives? Performance becomes a crap shoot. Imagine the impact on performance when just part of your data is on SSD and part on SATA. The Applications will, essentially, be slowed down to the SATA speed. When your data is haphazardly scattered across different tiers that are as extreme as SSD and SATA then you will suffer. The chain is only as strong as its weakest link. The performance of a LUN is only as fast as its slowest disk.<BR/><BR/>Chris, I'd be happy to setup a briefing for you to review Pillar's solutions and architecture and compare and contrast the Axiom to the competitions offerings. <BR/><BR/>Jim McKinstry<BR/>Director, Marketing<BR/>Pillar Data Systems<BR/>jmckinstry@pillardata.comJim McKinstryhttps://www.blogger.com/profile/00765343362040634819noreply@blogger.com