Parse Switches to Amazon SSD-backed Instances With Huge Performance Gains(blog.parse.com)
blog.parse.com
Parse Switches to Amazon SSD-backed Instances With Huge Performance Gains
http://blog.parse.com/2012/09/17/parse-databases-upgraded-to-amazon-provisioned-iops/
2 comments
Could someone explain the following terms:
Elastic Block Storage unit,
IOPS,
Striped 1000-IOPS EBS volumes,
Memory warmup time.
EBS unit: Don't worry about this one, they just mean that it's something you can buy from AWS that pertains to EBS.
IOPS: I/O operations per second. If you pay Amazon for Provisioned IOPS, they will guarantee that you can fetch at least N contiguous blocks of bytes per second, for at least 99% of seconds.
Striped 1000-IOPS EBS volumes: Two volumes, each with 1000 provisioned IOPS, arranged in RAID-0 to get roughly twice the bandwidth of a single volume.
Memory warmup time: From the time you start a long-running task (a database process in this case, from the sound of it) until your memory contents have reached a steady state. At this point, everything you need frequently is loaded into memory, so your I/O traffic will be representative of steady state, rather than an artifact of loading in a bunch of stuff at the beginning of the task/process.
IOPS: I/O operations per second. If you pay Amazon for Provisioned IOPS, they will guarantee that you can fetch at least N contiguous blocks of bytes per second, for at least 99% of seconds.
Striped 1000-IOPS EBS volumes: Two volumes, each with 1000 provisioned IOPS, arranged in RAID-0 to get roughly twice the bandwidth of a single volume.
Memory warmup time: From the time you start a long-running task (a database process in this case, from the sound of it) until your memory contents have reached a steady state. At this point, everything you need frequently is loaded into memory, so your I/O traffic will be representative of steady state, rather than an artifact of loading in a bunch of stuff at the beginning of the task/process.