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This article mainly introduces "what is the default value of gluster repeater". In daily operation, I believe many people have doubts about what the default value of gluster repeater is. The editor consulted all kinds of data and sorted out simple and easy-to-use methods of operation. I hope it will be helpful for you to answer the doubt of "what is the default value of gluster repeater?" Next, please follow the editor to study!

Performance-related repeaters write-behind, read-ahead, io-cache, quick-read, open-behind, stat-prefetch (md-cache), io-threads (default server)

All the above repeaters are turned on by default, while symlink-cache is turned off by default.

NFS related performance optimization repeater

Enabled by default:

Performance.nfs.write-behind

Off by default:

Performance.nfs.read-ahead

Performance.nfs.io-cache

Performance.nfs.quick-read

Performance.nfs.stat-prefetch

Performance.nfs.io-threads

Performance.force-readdirp

Default configuration and default value 1, default configuration relay

In the. / vols/tank/tank-fuse.vol (client) file, the following repeaters are configured by default:

Dht and performance-related write-behind, read-ahead, io-cache, quick-read, open-behind, stat-prefetch (md-cache).

In the. / vols/tank/tank.node1.data-disk3.vol peer (server-side) file, the following repeater parameters are set by default:

Posix 、 access-control 、 locks 、 io-threads 、 index 、 maker

2. Default configuration item value

Cache-size

Io-cahce:cache-size: default 32MB

Size of the read cache

Quick-read:cache-size: default 128MB

Size of the read cache

Gluster volume set tank cache-size 32MB

The cache-size update caused by this command consists of two parts, one is the corresponding cache size in io-cache, and the other is the cache size in quick-read.

From the source code point of view, the two cache-size correspond to the same key, so there will be a complete change phenomenon, should be a bug.

Read-ahead:page-count: default value 4

Key is performance.read-ahead-page-count and can be set with this option.

Gluster volume set tank read-ahead-page-count 4

Number of pages that will be pre-fetched

Write-behind: "cache-size" or "window-size": default value 1MB

Key is performance.write-behind-window-size and can be set with this option.

Gluster volume set tank write-behind-window-size 1MB

Size of the write-behind buffer for a single file (inode).

Io-threads:thread-count: default 16

Key:performance.io-thread-count

Gluster volume set tank io-thread-count 16

Number of threads in IO threads translator which perform concurrent IO operations at a given time

The configuration is saved in the / vols/tank/tank.node1.data-disk3.vol peer file.

Md-cache:md-cache-timeout: default value 1 (also stat-prefetch)

Gluster volume set tank md-cache-timeout 1

This action changes the default value of the md-cache repeater md-cache-timeout option

Time period after which cache has to be refreshed

Io-cache:cache-timeout: default value 1

Key:performance.cache-refresh-timeout

Gluster volume set tank cache-refresh-timeout 1

Cache-timeout:The cached data for a file will be retained till 'cache-refresh-timeout' seconds, after which data re-validation is performed.

Note: the default parameters are based on GlusterFS 3.4.5

At this point, the study on "what is the default value of gluster repeater" is over. I hope to be able to solve your doubts. The collocation of theory and practice can better help you learn, go and try it! If you want to continue to learn more related knowledge, please continue to follow the website, the editor will continue to work hard to bring you more practical articles!

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