NetApp and Solaris

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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

<source lang=bash>

            1. 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";

            1. END changes by host_config ####

</syntaxhighlight>

Check it out

<source lang=bash>

  1. 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];}'

</syntaxhighlight>

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

<source lang=bash>

  1. 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

... </syntaxhighlight> Or use "lun alignment show": <source lang=bash>

  1. 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

</syntaxhighlight>

Or "stats show lun": <source lang=bash> filer01*> stats show -e lun:/vol/TEMP201:.*_align_histo.* </syntaxhighlight>

ashift=12? Why 12?

<source lang=bash>

  1. echo "2^12" | bc -l

4096 </syntaxhighlight> OK... 4k... I see.

What ashift do I have?

<source lang=bash>

  1. zdb | egrep ' name|ashift'
   name: 'apache_pool'
           ashift: 9
   name: 'mysql_pool'
           ashift: 9

... </syntaxhighlight>

Create ZPools on NetApp LUNs with this syntax

<source lang=bash>

  1. zpool create -o ashift=12 <mypool> mirror <vdev1> <vdev2>

</syntaxhighlight>

Solaris Cluster

<source lang=bash>

  1. /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 ... </syntaxhighlight>

Links

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