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Tue, 10 Sep 2024 09:23:23 +0200 (CEST) Date: Tue, 10 Sep 2024 09:23:19 +0200 (CEST) From: "Mkrtchyan, Tigran" To: marc eshel Cc: Olga Kornievskaia , schumaker anna , linux-nfs , Trond Myklebust Message-ID: <2102290340.59910889.1725952999821.JavaMail.zimbra@desy.de> In-Reply-To: References: <685478263.45656552.1723405271880.JavaMail.zimbra@z-mbx-2> Subject: Re: NFS client to pNFS DS Precedence: bulk X-Mailing-List: linux-nfs@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg=sha-256; boundary="----=_Part_59910952_1509897232.1725953003255" X-Mailer: Zimbra 9.0.0_GA_4612 (ZimbraWebClient - FF130 (Linux)/9.0.0_GA_4612) Thread-Topic: NFS client to pNFS DS Thread-Index: anyJSxFV4Ckh/M0jAnyLPm/XCnlhTg== ------=_Part_59910952_1509897232.1725953003255 Date: Tue, 10 Sep 2024 09:23:19 +0200 (CEST) From: "Mkrtchyan, Tigran" To: marc eshel Cc: Olga Kornievskaia , schumaker anna , linux-nfs , Trond Myklebust Message-ID: <2102290340.59910889.1725952999821.JavaMail.zimbra@desy.de> In-Reply-To: References: <685478263.45656552.1723405271880.JavaMail.zimbra@z-mbx-2> Subject: Re: NFS client to pNFS DS MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit X-Mailer: Zimbra 9.0.0_GA_4612 (ZimbraWebClient - FF130 (Linux)/9.0.0_GA_4612) Thread-Topic: NFS client to pNFS DS Thread-Index: anyJSxFV4Ckh/M0jAnyLPm/XCnlhTg== 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" > To: "Tigran Mkrtchyan" , "Olga Kornievskaia" > Cc: "schumaker anna" , "linux-nfs" , "Trond Myklebust" > > 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. 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