![]() ![]() It is easy to see the relationship between throughput, IOPS and block sizes. The same throughput is achieved with 32000 blocks of 4K each (32,000 IOPS at 4K block size). If 2000 blocks of 64K each can be written, throughput is still 128MB/s (2000*64K/s). Typically stated in KB/MB/GB/s (e.g., if a storage device can write 1000 blocks of 128K each, throughput is 1000*128K/s = 128MB/s). Throughput is the measure of the amount of data transferred from/to a storage device in a second.Typically, storage device vendors use smallest possible block sizes (512 bytes for magnetic disks, 4K for SSDs) to measure IOPS (read on and it will be clear soon as to why). IO operations per second (IOPS) is a measure of how many IO requests can be completed by the storage device in a second.They are also able to receive data in sizes of multiples of blocks (typically limited by a maximum that the controller – storage interface adapter such as Fibre Channel – can support). Storage devices store data in units of blocks. Block size is the measure of amount of data written/read in a single IO request.Organizations often spin-up Amazon EBS Provisioned IOPS SSD (io1) volumes to achieve guaranteed performance but don’t see the performance they expect to see.Īssess EBS performance by reviewing the following: Amazon Elastic Block Storage (EBS) performance is a mystery to many-certainly if you are not familiar with all the factors that impact performance. ![]()
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