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a7e014eee5
If a pNFS server's DS runs out of disk space, it replies NFSERR_NOSPC to the client doing writing. For the Linux client, it then sends a LayoutError RPC to the server to tell it about the error and keeps retrying, doing repeated LayoutGet and Write RPCs to the DS. The Linux client is "stuck" until disk space on the DS is free'd up. For a mirrored server configuration, the first mirror that ran out of space was taken offline. This does not make much sense, since the other mirror(s) will run out of space soon and the fix is a manual cleanup up disk space. This patch changes the pNFS server to not disable a mirror for the mirrored case when this occurs. Further work is needed, since the Linux client expects the MDS to reply NFSERR_NOSPC to LayoutGets once the DS is out of space. Without this further change, the above mentioned looping occurs. Found during a recent IEFT NFSv4 working group testing event. MFC after: 2 weeks |
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