Lsm mul thread #228
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smilecuty
reviewed
Jan 23, 2024
| 在 chunk 内部，处理磁盘 IO 的组件为 LSM(Local Storage Manager)。 默认情况下，LSM 是以单线程的形态运行，当用户对 IO 延迟和性能上限有更高的要求，并且 k8s worker 节点上有足够的 cpu 资源时，可以考虑开启 LSM 多线程 | ||
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| ## 配置 LSM 多线程 | ||
| 在 IOMesh Helm Values 文件中, 配置 `iomesh.chunk.extraEnvs` 字段 |
| chunk: | ||
| extraEnvs: | ||
| LSM_IO_THREAD_NUM: "2" # 配置 LSM 使用的独立线程数量，取值范围为 0-2，如果为 0 则代表不开启 LSM 多线程 | ||
| ``` |
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| 对于已部署的 IOMesh 集群，修改完毕后可以使用 helm upgrade 对集群进行配置更新，chunk pod 会逐个重启并生效配置。 | ||
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| # cpu 核心绑定与独占 |
smilecuty
reviewed
Jan 23, 2024
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| # 为 chunk 配置更多 cpu 核心 | ||
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| 在 chunk 内部，处理磁盘 IO 的组件为 LSM(Local Storage Manager)。 默认情况下，LSM 是以单线程的形态运行，当用户对 IO 延迟和性能上限有更高的要求，并且 k8s worker 节点上有足够的 cpu 资源时，可以考虑开启 LSM 多线程 |
smilecuty
reviewed
Jan 24, 2024
| 如果 chunk 开启了 lsm 多线程，通过如下命令验证 lsm 是否使用了独立的 cgroup 配置和核心 | ||
| ```shell | ||
| # cat /sys/fs/cgroup/cpuset/zbs/lsm-io/cpuset.cpus | ||
| 2 |
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