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use all the available nr_requests for NVMe (#18920)

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Harshavardhana
2024-01-30 14:10:06 -08:00
committed by GitHub
parent 6da4a9c7bb
commit f25cbdf43c
2 changed files with 21 additions and 3 deletions
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19
cmd/xl-storage-disk-id-check.go
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@@ -209,9 +209,24 @@ func newXLStorageDiskIDCheck(storage *xlStorage, healthCheck bool) *xlStorageDis
})
if driveMaxConcurrent <= 0 {
driveMaxConcurrent = 512
// nr_requests is for both READ and WRITE separately
// so we this 2x tokens on our end.
//
// https://www.kernel.org/doc/Documentation/block/queue-sysfs.txt
//
// nr_requests (RW)
// ----------------
// This controls how many requests may be allocated in the block layer for
// read or write requests. Note that the total allocated number may be twice
// this amount, since it applies only to reads or writes (not the accumulated
// sum).
driveMaxConcurrent = int(storage.nrRequests) * 2
if driveMaxConcurrent <= 0 {
driveMaxConcurrent = 1023 * 2 // Default value on Linux for most NVMe
}
if storage.rotational {
driveMaxConcurrent = int(storage.nrRequests) / 2
// use 80% of the available nr_requests on HDDs
driveMaxConcurrent = int(float64(storage.nrRequests)*0.8) * 2
if driveMaxConcurrent < 32 {
driveMaxConcurrent = 32
}