Indeed, old-style disk EBS vs new-style SSd EBS. Be aware that EBS traffic is considered as part of the total "network" traffic, and each type of instance has different limits on maximum network throughput. Those difference are very significant, do tests on the same volume between two different type of instances, both with enough cpu and memory for the I/O to be the bottleneck, you will be surprised! On 2016-05-25 17:02, Rayson Ho wrote: > There are many factors that can affect EBS performance. For example, the type > of EBS volume, the instance type, whether EBS-optimized is turned on or not, etc. > > Without the details, then there is no apples to apples comparsion... > > Rayson > > ================================================== > Open Grid Scheduler - The Official Open Source Grid Engine > http://gridscheduler.sourceforge.net/ > http://gridscheduler.sourceforge.net/GridEngine/GridEngineCloud.html > > > > On Wed, May 25, 2016 at 6:34 PM, Tory M Blue <tmblue@xxxxxxxxx > <mailto:tmblue@xxxxxxxxx>> wrote: >> >> We are starting some testing in AWS, with EC2, EBS backed setups. >> >> What I found interesting today, was a single EBS 1TB volume, gave me >> something like 108MB/s throughput, however a RAID10 (4 250GB EBS >> volumes), gave me something like 31MB/s (test after test after test). >> >> I'm wondering what you folks are using inside of Amazon (not >> interested in RDS at the moment). >> >> Thanks >> Tory >> >> >> -- >> Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx > <mailto:pgsql-performance@xxxxxxxxxxxxxx>) >> To make changes to your subscription: >> http://www.postgresql.org/mailpref/pgsql-performance -- http://yves.zioup.com gpg: 4096R/32B0F416 -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
