Re: NFS client to pNFS DS

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Hi Tigran,

Thank you for the information, but still why there are more 512K reads than 1M, I see now about 5 reads of size 512K for every 1M read.

Marc.

On 9/10/24 12:23 AM, Mkrtchyan, Tigran wrote:
Hi Marc,

AFAIK, 1M is the max IO size that linux nfs client will use.

linux/nfs_xdr.h:#define NFS_MAX_FILE_IO_SIZE    (1048576U)

Best regards,
    Tigran.

----- Original Message -----
From: "marc eshel" <eshel.marc@xxxxxxxxx>
To: "Tigran Mkrtchyan" <tigran.mkrtchyan@xxxxxxx>, "Olga Kornievskaia" <aglo@xxxxxxxxx>
Cc: "schumaker anna" <schumaker.anna@xxxxxxxxx>, "linux-nfs" <linux-nfs@xxxxxxxxxxxxxxx>, "Trond Myklebust"
<trondmy@xxxxxxxxxxxxxxx>
Sent: Tuesday, 10 September, 2024 01:23:43
Subject: Re: NFS client to pNFS DS
Can someone explain why the NFS client is reading 1M followed by 2 reads
of 1/2M and repeats this pattern. For pNFS or NFS4.

The mount was for 4M rsize=4194304.

Thanks, Marc.




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