SSD定点観測

前回の続き。９ヶ月経過。現在のヒットポイントは83/100。

あと、データセットが大きくなってきた分I/O負荷が上がってる。一見まだ余裕ありそうだけどSSDなので、書き込みが増えると読み込みがサチる点注意が必要。

$ sudo smartctl -d ata -a /dev/sdc
smartctl version 5.38 [x86_64-unknown-linux-gnu] Copyright (C) 2002-8 Bruce Allen
Home page is http://smartmontools.sourceforge.net/

=== START OF INFORMATION SECTION ===
Device Model:     INTEL SSDSA2M160G2GC
Serial Number:    CVPO9404019D160AGN
Firmware Version: 2CV102HD
User Capacity:    160,041,885,696 bytes
Device is:        Not in smartctl database [for details use: -P showall]
ATA Version is:   7
ATA Standard is:  ATA/ATAPI-7 T13 1532D revision 1
Local Time is:    Fri Sep 17 11:18:04 2010 JST
SMART support is: Available - device has SMART capability.
SMART support is: Enabled
(snip)
ID# ATTRIBUTE_NAME          FLAG     VALUE WORST THRESH TYPE      UPDATED  WHEN_FAILED RAW_VALUE
  3 Spin_Up_Time            0x0020   100   100   000    Old_age   Offline      -       0
  4 Start_Stop_Count        0x0030   100   100   000    Old_age   Offline      -       0
  5 Reallocated_Sector_Ct   0x0032   100   100   000    Old_age   Always       -       21
  9 Power_On_Hours          0x0032   100   100   000    Old_age   Always       -       6700
 12 Power_Cycle_Count       0x0032   100   100   000    Old_age   Always       -       46
192 Power-Off_Retract_Count 0x0032   100   100   000    Old_age   Always       -       24
225 Load_Cycle_Count        0x0030   200   200   000    Old_age   Offline      -       1262715
226 Load-in_Time            0x0032   100   100   000    Old_age   Always       -       627
227 Torq-amp_Count          0x0032   100   100   000    Old_age   Always       -       4
228 Power-off_Retract_Count 0x0032   100   100   000    Old_age   Always       -       3204105587
232 Unknown_Attribute       0x0033   099   099   010    Pre-fail  Always       -       0
233 Unknown_Attribute       0x0032   083   083   000    Old_age   Always       -       0
184 Unknown_Attribute       0x0033   100   100   099    Pre-fail  Always       -       0
(snip)
$ iostat -dxk /dev/sdc
Linux 2.6.31-14-server (???????????) 	09/17/2010 	_x86_64_	(4 CPU)

Device:         rrqm/s   wrqm/s     r/s     w/s    rkB/s    wkB/s avgrq-sz avgqu-sz   await  svctm  %util
sdc             517.21    42.08  933.90   95.49 16092.58  2008.09    35.17     0.04    1.09   0.38  39.59