The File Placement Policy that you are trying to set cannot use the size of the file to determine the placement of the file in a GPFS Storage Pool. This is because GPFS has no idea what the file size will be when the file is open()’d for writing.
Hope that helps! -Bryan PS. I really wish that we could use a path for specifying data placement in a GPFS Pool, and not just the file name, owner, etc. I’ll submit a RFE for this. From: [email protected] [mailto:[email protected]] On Behalf Of J. Eric Wonderley Sent: Monday, October 31, 2016 11:53 AM To: gpfsug main discussion list Subject: [gpfsug-discuss] wanted...gpfs policy that places larger files onto a pool based on size I wanted to do something like this... [root@cl001 ~]# cat /opt/gpfs/home.ply /*Failsafe migration of old small files back to spinning media pool(fc_8T) */ RULE 'theshold' MIGRATE FROM POOL 'system' THRESHOLD(90,70) WEIGHT(ACCESS_TIME) TO POOL 'fc_8T' /*Write files larger than 16MB to pool called "fc_8T" */ RULE 'bigfiles' SET POOL 'fc_8T' WHERE FILE_SIZE>16777216 /*Move anything else to system pool */ RULE 'default' SET POOL 'system' Apparently there is no happiness using FILE_SIZE in a placement policy: [root@cl001 ~]# mmchpolicy home /opt/gpfs/home.ply Error while validating policy `home.ply': rc=22: PCSQLERR: 'FILE_SIZE' is an unsupported or unknown attribute or variable name in this context. PCSQLCTX: at line 4 of 6: RULE 'bigfiles' SET POOL 'fc_8T' WHERE {{{FILE_SIZE}}}>16777216 runRemoteCommand_v2: cl002.cl.arc.internal: tschpolicy /dev/home /var/mmfs/tmp/tspolicyFile.mmchpolicy.113372 -t home.ply failed. mmchpolicy: Command failed. Examine previous error messages to determine cause. Can anyone suggest a way to accomplish this using policy? ________________________________ Note: This email is for the confidential use of the named addressee(s) only and may contain proprietary, confidential or privileged information. If you are not the intended recipient, you are hereby notified that any review, dissemination or copying of this email is strictly prohibited, and to please notify the sender immediately and destroy this email and any attachments. Email transmission cannot be guaranteed to be secure or error-free. The Company, therefore, does not make any guarantees as to the completeness or accuracy of this email or any attachments. This email is for informational purposes only and does not constitute a recommendation, offer, request or solicitation of any kind to buy, sell, subscribe, redeem or perform any type of transaction of a financial product.
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