tuto:linux:tunning_hdd
Différences
Ci-dessous, les différences entre deux révisions de la page.
| Les deux révisions précédentesRévision précédenteProchaine révision | Révision précédente | ||
| tuto:linux:tunning_hdd [2013/06/25 21:10] – [tuning cfq] root | tuto:linux:tunning_hdd [2016/10/27 21:15] (Version actuelle) – [Tunning HDD] root | ||
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| ====== Tunning HDD ====== | ====== Tunning HDD ====== | ||
| + | ===== mdadm ===== | ||
| + | [[https:// | ||
| ===== sysfs ===== | ===== sysfs ===== | ||
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| * **slice_sync** : This tunable dictates the time slice allotted to a process issuing synchronous (read or direct write) I/O. The default is 100 ms. | * **slice_sync** : This tunable dictates the time slice allotted to a process issuing synchronous (read or direct write) I/O. The default is 100 ms. | ||
| ===== tuning deadline ===== | ===== tuning deadline ===== | ||
| + | |||
| + | http:// | ||
| * **fifo_batch** : This determines the number of reads or writes to issue in a single batch. The default is 16. Setting this to a higher value may result in better throughput, but will also increase latency. | * **fifo_batch** : This determines the number of reads or writes to issue in a single batch. The default is 16. Setting this to a higher value may result in better throughput, but will also increase latency. | ||
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| * **write_expire** : This tunable allows you to set the number of milliseconds in which a write request should be serviced. By default, this is set to 5000 ms (five seconds). | * **write_expire** : This tunable allows you to set the number of milliseconds in which a write request should be serviced. By default, this is set to 5000 ms (five seconds). | ||
| * **writes_starved** : This tunable controls how many read batches can be processed before processing a single write batch. The higher this is set, the more preference is given to reads. | * **writes_starved** : This tunable controls how many read batches can be processed before processing a single write batch. The higher this is set, the more preference is given to reads. | ||
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| ===== Script ===== | ===== Script ===== | ||
tuto/linux/tunning_hdd.1372194647.txt.gz · Dernière modification : de root