NetApp and Solaris: Difference between revisions
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==Alignment and ZFS== | ==Alignment and ZFS== | ||
First read [https://library.netapp.com/ecmdocs/ECMP1148982 | First read [https://library.netapp.com/ecmdocs/ECMP1148982/html/GUID-42CC2EB6-E667-4305-914C-7C2C459EF841.html ZFS zpools create misaligned I/O in Solaris 11 and Solaris 10 Update 8 and later (407376)]. | ||
If you have 4k as block size in your storage use ashift=12 (alignment shift exponent). | If you have 4k as block size in your storage use ashift=12 (alignment shift exponent). | ||
Revision as of 13:19, 28 September 2016
Solaris NetApp Just some unsorted lines... Working on it... don't believe what you can read here! It is not proofed for now.
Settings in Solaris
Settings for MPxIO over FC:
/kernel/drv/ssd.conf
###### START changes by host_config #####
ssd-config-list="NETAPP LUN", "physical-block-size:4096, retries-busy:30, retries-reset:30, retries-notready:300, retriestimeout:10, throttle-max:64, throttle-min:8";
###### END changes by host_config ####
Check it out
# iostat -Er | /opt/sfw/bin/gawk 'BEGIN{command="echo ::ssd_state | mdb -k"; while(command|getline){if(/^un [0-9]+:/ && $NF != "0"){ssd=$2;gsub(/:$/,"",ssd);while(!/^}/){command|getline;if(/un_phy_blocksize/){un_phy_blocksize[ssd]=strtonum($NF);}}}};close(command);}/ssd/{ssd=$1;gsub(/^ssd/,"",ssd);getline;split($0,vendor,",");printf "ssd: %s\tun_phy_blocksize: %d\t%s\t%s\n",ssd,un_phy_blocksize[ssd],vendor[1],vendor[4];}'
Alignment and ZFS
First read ZFS zpools create misaligned I/O in Solaris 11 and Solaris 10 Update 8 and later (407376).
If you have 4k as block size in your storage use ashift=12 (alignment shift exponent).
Status of alignment
# ssh filer01 "priv set -q diag ; lun show -v all; priv set"
-------------------------------------------------------------------------------
LUN for ZFS
-------------------------------------------------------------------------------
/vol/ZoneLUNs/Zone01.lun 50g (53687091200) (r/w, online, mapped)
Serial#: 800KP+EpO-33
Share: none
Space Reservation: enabled
Multiprotocol Type: solaris_efi
Maps: SUN_SERVER01_SERVER02=40
Occupied Size: 46.2g (49583595520)
Creation Time: Wed Jan 7 11:37:58 CET 2015
---> Alignment: partial-writes
Cluster Shared Volume Information: 0x0
Space_alloc: disabled
report-physical-size: enabled
Read-Only: disabled
-------------------------------------------------------------------------------
LUN for Oracle Database
-------------------------------------------------------------------------------
/vol/TEMP201/TEMP201 25g (26843545600) (r/w, online, mapped)
Serial#: 800KP+EpO-2t
Share: none
Space Reservation: enabled
Multiprotocol Type: solaris_efi
Maps: SUN_SERVER01_SERVER02=35
Occupied Size: 21.6g (23195856896)
Creation Time: Fri Jul 4 11:02:34 CEST 2014
---> Alignment: misaligned
Cluster Shared Volume Information: 0x0
Space_alloc: disabled
report-physical-size: enabled
Read-Only: disabled
...
Or use "lun alignment show":
# ssh filer01 "priv set -q diag ; lun alignment show; priv set"
-------------------------------------------------------------------------------
LUN for ZFS
Wide spread reads. I think the ashift is not correct.
-------------------------------------------------------------------------------
/vol/ZoneLUNs/Zone01.lun
Multiprotocol type: solaris_efi
Alignment: partial-writes
Write alignment histogram percentage: 5, 5, 4, 6, 4, 6, 14, 5
Read alignment histogram percentage: 8, 7, 10, 7, 7, 8, 36, 5
Partial writes percentage: 47
Partial reads percentage: 9
-------------------------------------------------------------------------------
LUN for Oracle Database
-------------------------------------------------------------------------------
/vol/TEMP201/TEMP201
Multiprotocol type: solaris_efi
Alignment: misaligned
Write alignment histogram percentage: 0, 0, 0, 0, 0, 0, 99, 0
Read alignment histogram percentage: 0, 0, 8, 0, 0, 0, 77, 0
Partial writes percentage: 0
Partial reads percentage: 14
Or "stats show lun":
filer01*> stats show -e lun:/vol/TEMP201:.*_align_histo.*
ashift=12? Why 12?
# echo "2^12" | bc -l
4096
OK... 4k... I see.
What ashift do I have?
# zdb | egrep ' name|ashift'
name: 'apache_pool'
ashift: 9
name: 'mysql_pool'
ashift: 9
...
Create ZPools on NetApp LUNs with this syntax
# zpool create -o ashift=12 <mypool> mirror <vdev1> <vdev2>
Solaris Cluster
# /opt/NTAP/SANToolkit/bin/sanlun lun show | nawk '$3 ~ /^\/dev\//{line=$0;gsub(/s[0-9]+$/,"",$3);command="/usr/cluster/bin/cldev list "$3; command | getline; close(command); print line,$1; next;}NR==2{print $0,"DID";next;}NR==3{print $0"-------";next}{print;}'
controller(7mode)/ device host lun
vserver(Cmode) lun-pathname filename adapter protocol size mode DID
--------------------------------------------------------------------------------------------------------------------------------------------------------
ncl01-iscsi-svm1 /vol/vol_cyrus01/lun_tz_cyrus01_1 /dev/rdsk/c0t600A0980383033777B244834556D4865d0s2 iscsi0 iSCSI 500.1g C d5
ncl01-iscsi-svm1 /vol/vol_cyrus01/lun_tz_cyrus01_2 /dev/rdsk/c0t600A0980383033777B244834556D4866d0s2 iscsi0 iSCSI 500.1g C d6
ncl01-iscsi-svm1 /vol/vol_cyrus01/lun_tz_cyrus01_3 /dev/rdsk/c0t600A0980383033777B244834556D4867d0s2 iscsi0 iSCSI 500.1g C d7
...
