[CrystalDiskMark] µ¨ R720, LSI 9271-8i

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DELL PowerEdge R720
LSI MegaRaid 9271-8i
DELL SAS 15k 600G 2EA - Raid 1
Intel 520 SSD 120G
CacheCadelj16; readonly/196; 설1221;

1. ssd cache disable / Always Write Back / Always Read Ahead / Cached IO / Disk Cache Enabled





2. ssd cache enable / Always Write Back / Always Read Ahead / Cached IO / Disk Cache Enabled




3. ssd cache enable / Always Write Back / Always Read Ahead / Direct IO / Disk Cache Enabled







- to be continue -
ȸ¿øK 2014-02
3¹øÀ» º¸¸é ssd cache enable / Always Write Back / Always Read Ahead / Direct IO / Disk Cache Enabled
Direct IO ¶§¹®ÀÎÁö SSD 1°³ÀÇ ¼Óµµ°¡ ³ª¿À´Â °Í °°½À´Ï´Ù.
4kbÀÇ read¸¸ ÁÁ¾ÆÁö°í ÀüüÀûÀ¸·Î ³ªºüÁý´Ï´Ù.

ssd 2°³¸¦ raid 1À¸·Î ¹­À¸¸é read´Â 2¹è·Î ¿Ã¶ó°¡°ÚÁÒ?
½ÇÀü¿¡¼­´Â 4kbÀ̹ǷΠ4kb¸¦ ¾²´Â°Ô ¸Â´Â °ÍÀΰ¡¿ä?

°í¹ÎµË´Ï´Ù.
¸Ö¸° 2014-02
cachecade °¡ È°¼ºÈ­µÈ °Í Ä¡°í´Â 4k, 4k Qd32°ªÀÌ ³Ê¹« ³·¾Æº¸ÀÔ´Ï´Ù...
È°¼ºÈ­¿Í ºñÈ°¼ºÈ­ÀÇ Â÷ÀÌ°¡ º°·Î ¾ø¾îº¸À̳׿ä.

Á¦ Å×½ºÆ® ±Û 2°³ ´Ù º¸½Ã¸é ¾Æ½Ã°ÚÁö¸¸, cachecade on/off ½Ã  4k ·£´ý°ªÀÌ 4~6¹èÁ¤µµ Â÷ÀÌ´Â ÀÖ¾ú½À´Ï´Ù.
´Ü, cachecade Ư¼º»ó ½ÃÄö¼ÈÀÌ ¶³¾îÁö´Â °Ç ¾î¿ ¼ö ¾ø½À´Ï´Ù.

¶ÇÇÑ, ÀúÈñ °°Àº °æ¿ì 520 ¸ðµ¨À» ¾²¸é¼­ 180G¸¦ ½è´ø ÀÌÀ¯Áß Çϳª°¡ 180G¿Í 120G´Â ¼º´É»ó IOPS Â÷ÀÌ°¡ ¸¹¾Ò½À´Ï´Ù. ¶§¹®¿¡ 180G¸¦ ÃÖÀú ¸¶Áö³ë¼±À¸·Î Àâ°í ÁøÇàÇß¾ú½À´Ï´Ù.
     
ȸ¿øK 2014-02
¿¹... 4k °ªÀÌ ³Ê¹« ³·½À´Ï´Ù.

¿Ã·ÁÁֽŠ°ÍÁß¿¡ 2¹ø° ±Û¿¡ ÀÖ´Â,
¹æ¹ýÀÌ ´äÀÎ °Í °°Àºµ¥...
ÀçÇöÀÌ ¾ÈµÇ³×¿ä.
Cachecade on(readonly) + direct io

SSDÀÇ iops ¶§¹®Àϱî¿ä?
iops°¡ ³ôÀº ssd·Î º¯°æÀ» ÇÏ¸é ³ô¾ÆÁú±î¿ä?
ȸ¿øK 2014-02
http://www.intel.com/content/www/us/en/solid-state-drives/solid-state-drives-520-series.html
ÀÎÅÚ 520 120GB ssd - 4k random read 25,000 IOPS
ÀÎÅÚ 520 180GB ssd - 4k random read 50,000 IOPS


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