What's more important for a FreeNAS SLOG drive, lower latency or higher write performance?
Consider the following:
Intel S3710 200 GB
Seq Read = 550 MB/s
Seq Write = 300 MB/s
Random Read = 85,000 IOPS
Random Write = 43,000 IOPS
Read Latency = 55 us
Write Latency = 66 us
Lifetime Writes = 3.6 PB
Intel S4600 240 GB
Seq Read = 500 MB/s
Seq Write = 260 MB/s
Random Read = 72,000 IOPS
Random Write = 38,000 IOPS
Read Latency = 36 us
Write Latency = 36 us
Lifetime Writes = 1.4 PB
(Read specs are probably meaningless for a SLOG drive but I'm listing them here for completeness.)
Note that the newer S4600 has much better latency specs but the older S3710 is somewhat better in the rest of the specs.
I'm not concerned about the difference in the Lifetime Writes spec as both figures seem sufficient for my needs.
Consider the following:
Intel S3710 200 GB
Seq Read = 550 MB/s
Seq Write = 300 MB/s
Random Read = 85,000 IOPS
Random Write = 43,000 IOPS
Read Latency = 55 us
Write Latency = 66 us
Lifetime Writes = 3.6 PB
Intel S4600 240 GB
Seq Read = 500 MB/s
Seq Write = 260 MB/s
Random Read = 72,000 IOPS
Random Write = 38,000 IOPS
Read Latency = 36 us
Write Latency = 36 us
Lifetime Writes = 1.4 PB
(Read specs are probably meaningless for a SLOG drive but I'm listing them here for completeness.)
Note that the newer S4600 has much better latency specs but the older S3710 is somewhat better in the rest of the specs.
I'm not concerned about the difference in the Lifetime Writes spec as both figures seem sufficient for my needs.