diff options
Diffstat (limited to 'Documentation/filesystems/pohmelfs/info.txt')
| -rw-r--r-- | Documentation/filesystems/pohmelfs/info.txt | 21 |
1 files changed, 17 insertions, 4 deletions
diff --git a/Documentation/filesystems/pohmelfs/info.txt b/Documentation/filesystems/pohmelfs/info.txt index 4e3d50157083..db2e41393626 100644 --- a/Documentation/filesystems/pohmelfs/info.txt +++ b/Documentation/filesystems/pohmelfs/info.txt | |||
| @@ -1,6 +1,8 @@ | |||
| 1 | POHMELFS usage information. | 1 | POHMELFS usage information. |
| 2 | 2 | ||
| 3 | Mount options: | 3 | Mount options. |
| 4 | All but index, number of crypto threads and maximum IO size can changed via remount. | ||
| 5 | |||
| 4 | idx=%u | 6 | idx=%u |
| 5 | Each mountpoint is associated with a special index via this option. | 7 | Each mountpoint is associated with a special index via this option. |
| 6 | Administrator can add or remove servers from the given index, so all mounts, | 8 | Administrator can add or remove servers from the given index, so all mounts, |
| @@ -52,16 +54,27 @@ mcache_timeout=%u | |||
| 52 | 54 | ||
| 53 | Usage examples. | 55 | Usage examples. |
| 54 | 56 | ||
| 55 | Add (or remove if it already exists) server server1.net:1025 into the working set with index $idx | 57 | Add server server1.net:1025 into the working set with index $idx |
| 56 | with appropriate hash algorithm and key file and cipher algorithm, mode and key file: | 58 | with appropriate hash algorithm and key file and cipher algorithm, mode and key file: |
| 57 | $cfg -a server1.net -p 1025 -i $idx -K $hash_key -k $cipher_key | 59 | $cfg A add -a server1.net -p 1025 -i $idx -K $hash_key -k $cipher_key |
| 58 | 60 | ||
| 59 | Mount filesystem with given index $idx to /mnt mountpoint. | 61 | Mount filesystem with given index $idx to /mnt mountpoint. |
| 60 | Client will connect to all servers specified in the working set via previous command: | 62 | Client will connect to all servers specified in the working set via previous command: |
| 61 | mount -t pohmel -o idx=$idx q /mnt | 63 | mount -t pohmel -o idx=$idx q /mnt |
| 62 | 64 | ||
| 63 | One can add or remove servers from working set after mounting too. | 65 | Change permissions to read-only (-I 1 option, '-I 2' - write-only, 3 - rw): |
| 66 | $cfg A modify -a server1.net -p 1025 -i $idx -I 1 | ||
| 67 | |||
| 68 | Change IO priority to 123 (node with the highest priority gets read requests). | ||
| 69 | $cfg A modify -a server1.net -p 1025 -i $idx -P 123 | ||
| 64 | 70 | ||
| 71 | One can check currect status of all connections in the mountstats file: | ||
| 72 | # cat /proc/$PID/mountstats | ||
| 73 | ... | ||
| 74 | device none mounted on /mnt with fstype pohmel | ||
| 75 | idx addr(:port) socket_type protocol active priority permissions | ||
| 76 | 0 server1.net:1026 1 6 1 250 1 | ||
| 77 | 0 server2.net:1025 1 6 1 123 3 | ||
| 65 | 78 | ||
| 66 | Server installation. | 79 | Server installation. |
| 67 | 80 | ||
