cache_hit_ratio 在bcache 来看,hit 和 miss 根据每个 IO 来计数,部分 hit 会被计为 miss cache_bypass_hits cache_bypass_misses 绕过缓存的 IO 的 hit 和 miss 的计数 cache_miss_collisions cache miss 插入 cache 的实例计数,但是随着写入和数据已经存在(通常为0,因为 cache miss 的同步被重写) 原文: C...
bcache中是以cache set来划分不同存储集合,一个cache set中包含一个或多个缓存设备(一般是ssd),一个或多个后端设备(一般是hdd)。 bcache对外输出给用户使用的是/dev/bcache这种设备,每个bcache设备都与一个后端物理盘一一对应。 用户对不同bcache设备的io会缓存在ssd中,刷脏数据的时候就会写到各自对应的后端设备上...
bcache状态配置⽂件详细介绍（翻译⾃官⽹）声明：⽂中斜体带下划线的段落为翻译不够准确的段落 原⽂：官⽹：什么是bcache bcache是linux内核块层cache.它使⽤类似SSD来作为HDD硬盘的cache,从⽽起到加速作⽤。 HDD硬盘便宜并且空间更⼤，SSD速度快但更贵。如果能两者兼得，岂不快哉？bcache能做到...
Write to this file to detach from a cache set. If there is dirty data in the cache, it will be flushed first. dirty_data Amount of dirty data for this backing device in the cache. Continuously updated unlike the cache set’s version, but may be slightly off. label Name of underlying ...
When the application sends an IO request, bcache searches the btree to check whether a cache hit occurred. This btree structure is stored in the caching device, and it will be loaded into memory as much as possible to improve cache checking performance. As the caching device grows, the ...
Bcache是Linux内核块设备层cache，支持多块HDD使用同一块SSD作为缓存盘。它让SSD作为HDD的缓存成为了可能...
When the application sends an IO request, bcache searches the btree to check whether a cache hit occurred. This btree structure is stored in the caching device, and it will be loaded into memory as much as possible to improve cache checking performance. As the caching device grows, the ...