Context
Command to dump the distribution summary of block usage:
Method
Command:
asinfo -v "dump-wb-summary:ns=<NamespaceID>"
output:
Apr 18 2016 16:04:01 GMT: INFO (drv_ssd): (drv_ssd.c:1880) WBH: Average wblock size of: defraggable blocks: 0 bytes; nondefraggable blocks: 95900 bytes; all blocks: 95900 bytes
Apr 18 2016 16:04:01 GMT: INFO (drv_ssd): (drv_ssd.c:1885) WBH: 244220 blocks of size 0 bytes
Apr 18 2016 16:04:01 GMT: INFO (drv_ssd): (drv_ssd.c:1885) WBH: 5 blocks of size 65536 bytes
Apr 18 2016 16:04:01 GMT: INFO (drv_ssd): (drv_ssd.c:1885) WBH: 3 blocks of size 65664 bytes
Apr 18 2016 16:04:01 GMT: INFO (drv_ssd): (drv_ssd.c:1885) WBH: 3 blocks of size 65792 bytes
Apr 18 2016 16:04:01 GMT: INFO (drv_ssd): (drv_ssd.c:1885) WBH: 3 blocks of size 65920 bytes
Apr 18 2016 16:04:01 GMT: INFO (drv_ssd): (drv_ssd.c:1885) WBH: 4 blocks of size 66048 bytes
Apr 18 2016 16:04:01 GMT: INFO (drv_ssd): (drv_ssd.c:1885) WBH: 1 block of size 66176 bytes
Apr 18 2016 16:04:01 GMT: INFO (drv_ssd): (drv_ssd.c:1885) WBH: 3 blocks of size 66304 bytes
Apr 18 2016 16:04:01 GMT: INFO (drv_ssd): (drv_ssd.c:1885) WBH: 1 block of size 66432 bytes
Apr 18 2016 16:04:01 GMT: INFO (drv_ssd): (drv_ssd.c:1885) WBH: 1 block of size 66560 bytes
Apr 18 2016 16:04:01 GMT: INFO (drv_ssd): (drv_ssd.c:1885) WBH: 5 blocks of size 66688 bytes
...
Apr 18 2016 16:04:01 GMT: INFO (drv_ssd): (drv_ssd.c:1885) WBH: 3 blocks of size 130304 bytes
Apr 18 2016 16:04:01 GMT: INFO (drv_ssd): (drv_ssd.c:1885) WBH: 1 block of size 130432 bytes
Apr 18 2016 16:04:01 GMT: INFO (drv_ssd): (drv_ssd.c:1885) WBH: 3 blocks of size 130688 bytes
Apr 18 2016 16:04:01 GMT: INFO (drv_ssd): (drv_ssd.c:1885) WBH: 652 blocks of size 131072 bytesNotes
- how many lines will be dumped in the logs?
- write-block-size / 128 bytes (rblock size) will give how many rblocks can possibly be used in 1 swb.
-
So 128KB write block size -> 1024 different size usage.
and 512KB -> 4096 different size usage,