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[75.80.15.10]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-2db041a02c7sm7569229a91.19.2024.09.10.22.54.43 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 10 Sep 2024 22:54:43 -0700 (PDT) Message-ID: <4c90da07-6de7-4158-ae8b-5eba1d39e367@gmail.com> Date: Tue, 10 Sep 2024 22:54:42 -0700 Precedence: bulk X-Mailing-List: linux-nfs@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: NFS client to pNFS DS To: "Mkrtchyan, Tigran" Cc: Olga Kornievskaia , schumaker anna , linux-nfs , Trond Myklebust References: <685478263.45656552.1723405271880.JavaMail.zimbra@z-mbx-2> <2102290340.59910889.1725952999821.JavaMail.zimbra@desy.de> Content-Language: en-US From: Marc Eshel In-Reply-To: <2102290340.59910889.1725952999821.JavaMail.zimbra@desy.de> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit 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" >> 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. For pNFS or NFS4. >> >> The mount was for 4M rsize=4194304. >> >> Thanks, Marc.