Difference between revisions of "Benchmarking: STFC Storage (GridPP) with Iozone"
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(Created page with "* Notes below are based on the 2014 test suits (these tests have been fairly consistent over the years) == Setup the RAID Array == * 22 Drives RAID6 array with WD SE WD4000F9...") |
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** Scheduler | ** Scheduler | ||
<syntaxhighlight> | <syntaxhighlight> | ||
| + | # To Set | ||
| + | # blockdev --setra 16384 /dev/sda | ||
| + | # echo 512 > /sys/block/sda/queue/nr_requests | ||
| + | # echo deadline > /sys/block/sda/queue/scheduler | ||
[root@localhost dp]# cat check_settings.sh | [root@localhost dp]# cat check_settings.sh | ||
#!/bin/bash | #!/bin/bash | ||
Revision as of 18:54, 19 October 2014
- Notes below are based on the 2014 test suits (these tests have been fairly consistent over the years)
Setup the RAID Array
- 22 Drives RAID6 array with WD SE WD4000F9YS Drives
- E5-2620v2 CPUs
- 64GB RAM
- LSI 9261 Controller with the following settings:
- RAID Level: 6
- Stripe Size: 256k
- Disk Cache Policy: Enabled
- Read Policy: Always Read Ahead
- Write Policy: Always Write Back
- IO Policy: Direct IO
Partition and Create FS
[root@localhost scripts]# cat intelligent-partitioner-dp.sh
#!/bin/bash
# Parted stuff
parted -a optimal /dev/sda unit % mkpart primary 0% 33% ; sleep 1
parted -a optimal /dev/sda unit % mkpart primary 33% 66% ; sleep 1
parted -a optimal /dev/sda unit % mkpart primary 66% 100% ; sleep 1
# sleep for 5
sleep 5
partprobe /dev/sda
sleep 5
# Create the XFS Part
mkfs.xfs -f -l version=2 -i size=1024 -n size=65536 -d su=256k,sw=22 -L castor1 /dev/sda1
sleep 2
mkfs.xfs -f -l version=2 -i size=1024 -n size=65536 -d su=256k,sw=22 -L castor2 /dev/sda2
sleep 2
mkfs.xfs -f -l version=2 -i size=1024 -n size=65536 -d su=256k,sw=22 -L castor3 /dev/sda3
sleep 2Mount the Filesystems - add the follwing to fstab
# fstab
/dev/disk/by-label/castor1 /exportstage/castor1 xfs logbufs=8,logbsize=256k,noatime,swalloc,inode64 0 2
/dev/disk/by-label/castor2 /exportstage/castor2 xfs logbufs=8,logbsize=256k,noatime,swalloc,inode64 0 2
/dev/disk/by-label/castor3 /exportstage/castor3 xfs logbufs=8,logbsize=256k,noatime,swalloc,inode64 0 2Tuning on the System
- Set the following
- Readahead
- Request Queue
- Scheduler
# To Set
# blockdev --setra 16384 /dev/sda
# echo 512 > /sys/block/sda/queue/nr_requests
# echo deadline > /sys/block/sda/queue/scheduler
[root@localhost dp]# cat check_settings.sh
#!/bin/bash
echo -en "[readahead]: "
blockdev --getra /dev/sda
echo -en "[nr_requests]: "
cat /sys/block/sda/queue/nr_requests
echo "[scheduler]: "
cat /sys/block/sda/queue/scheduler
[root@localhost dp]# ./check_settings.sh
[readahead]: 16384
[nr_requests]: 512
[scheduler]:
noop anticipatory [deadline] cfq