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Fix kernel tuning script to ignore write failures (#6107)

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Certain SCSI drivers do not allow certain tuning parameters
like nr_requests, max_sectors_kb to be changed, ignore these
errors silently as this script is simply a best effort.

Fixes #6103
This commit is contained in:
Harshavardhana 2018-06-30 14:55:21 -07:00 committed by kannappanr
parent 92a6676a2f
commit a5453c307f
1 changed files with 11 additions and 11 deletions
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22
docs/deployment/kernel-tuning/disk-tuning.sh
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@ -1,6 +1,6 @@
#!/bin/bash
## Minio Cloud Storage, (C) 2017 Minio, Inc.
## Minio Cloud Storage, (C) 2017, 2018 Minio, Inc.
##
## Licensed under the Apache License, Version 2.0 (the "License");
## you may not use this file except in compliance with the License.
@ -16,9 +16,9 @@
# This script changes protected files, and must be run as root
for i in $(ls -d /sys/block/*/queue/iosched 2>/dev/null); do
iosched_dir=$(echo $i | awk '/iosched/ {print $1}')
[ -z $iosched_dir ] && {
for i in $(echo /sys/block/*/queue/iosched 2>/dev/null); do
iosched_dir=$(echo "${i}" | awk '/iosched/ {print $1}')
[ -z "${iosched_dir}" ] && {
continue
}
## Change each disk ioscheduler to be "deadline"
@ -29,22 +29,22 @@ for i in $(ls -d /sys/block/*/queue/iosched 2>/dev/null); do
## see whether write requests have been starved for too
## long, and then decides whether to start a new batch
## of reads or writes
path=$(dirname $iosched_dir)
[ -f $path/scheduler ] && {
echo "deadline" > $path/scheduler
path=$(dirname "${iosched_dir}")
[ -f "${path}/scheduler" ] && {
echo "deadline" > "${path}/scheduler" 2>/dev/null || true
}
## 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 accumulate sum).
[ -f $path/nr_requests ] && {
echo "256" > $path/nr_requests
[ -f "${path}/nr_requests" ] && {
echo "256" > "${path}/nr_requests" 2>/dev/null || true
}
## This is the maximum number of kilobytes
## supported in a single data transfer at
## block layer.
[ -f $path/max_sectors_kb ] && {
echo "1024" > $path/max_sectors_kb || true
[ -f "${path}/max_sectors_kb" ] && {
echo "1024" > "${path}/max_sectors_kb" 2>/dev/null || true
}
done