TRIM
- Notify disk controller that data is no longer needed (reduces write amplification)
- Volume must be formatted on first use
Storage
- Directly Attached Storage (DAS)
- Virtual devices: ephemeral[0-23]
- Redundancy use: RAID 1/5/6
- Number of and type of volumes depends on instance type
- HDD, SSD, n SSD with TRIM support (up to 48TB)
- Device block mapping must be specified on launch (not stop->start)
- Use latest kernel for optimal performance
Use cases
- Buffers
- Caches
- Scratch Data
- Swap
- Very high IOPS (RAID 0)
- i2 (> 300K IOPS)
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