[gpfsug-discuss] FW: 'Flash (Alert): IBM Spectrum Scale (GPFS) V4.1.1.0 through 5.0.1.1: a read from or write to a DMAPI-migrated file may result in undetected data corruption or...

[Oesterlin, Robert]

[cid:forums.png] gpfs at us.ibm.com<https://urldefense.proofpoint.com/v2/url?u=http-3A__www.ibm.com_developerworks_community_profiles_html_profileView.do-3Fuserid-3D060000T9GF&d=DwMCaQ&c=djjh8EKwHtOepW4Bjau0lKhLlu-DxM1dlgP0rrLsOzY&r=LPDewt1Z4o9eKc86MXmhqX-45Cz1yz1ylYELF9olLKU&m=3MROJ4IHysUdoFBuLcjdmIZoyhVZhkc5B7akC5d3UrQ&s=qaM8zM9taqauMm_9u78ag5vuhlwoHKRJx5fKVwZd7ro&e=> created a topic named Flash (Alert): IBM Spectrum Scale (GPFS) V4.1.1.0 through 5.0.1.1: a read from or write to a DMAPI-migrated file may result in undetected data corruption or a recall failure<https://urldefense.proofpoint.com/v2/url?u=http-3A__www.ibm.com_developerworks_community_forums_html_topic-3Fid-3D7fb394b0-2Db121-2D4e25-2D94fc-2D7634e434fafb&d=DwMCaQ&c=djjh8EKwHtOepW4Bjau0lKhLlu-DxM1dlgP0rrLsOzY&r=LPDewt1Z4o9eKc86MXmhqX-45Cz1yz1ylYELF9olLKU&m=3MROJ4IHysUdoFBuLcjdmIZoyhVZhkc5B7akC5d3UrQ&s=zvkcT1meGoD98wIH019llMm-ccvSKHvVRh3vFuQbE30&e=> in the General Parallel File System - Announce (GPFS - Announce)<https://urldefense.proofpoint.com/v2/url?u=http-3A__www.ibm.com_developerworks_community_forums_html_forum-3Fid-3D11111111-2D0000-2D0000-2D0000-2D000000001606&d=DwMCaQ&c=djjh8EKwHtOepW4Bjau0lKhLlu-DxM1dlgP0rrLsOzY&r=LPDewt1Z4o9eKc86MXmhqX-45Cz1yz1ylYELF9olLKU&m=3MROJ4IHysUdoFBuLcjdmIZoyhVZhkc5B7akC5d3UrQ&s=YH3QraUtetdbVKro1UeYM71AKeXQhAqpLrEmIHtNLMk&e=> forum.

Abstract

IBM has identified a problem in IBM Spectrum Scale V4.1.1.0 through 5.0.1.1, in which under some conditions reading a DMAPI-migrated file may return zeroes instead of the actual data. Further, a DMAPI-migrate operation or writing to a DMAPI-migrated file may cause the size of the stub file to be updated incorrectly, which may cause a mismatch between the file size recorded in the stub file and in the migrated object. This may result in failure of a manual or transparent recall, when triggered by a subsequent read from or write to the file.



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Posting Date:

Friday, January 25, 2019 at 11:31:20 AM EST



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