Simon, I spoke to a tester who worked on this line item. She thinks mmchattr -E should have been documented. We will follow up. If it was an oversight it should be corrected soon. Jamie Jamie Davis GPFS Functional Verification Test (FVT) jamiedavis at us.ibm.com From: "Simon Thompson (Research Computing - IT Services)" <S.J.Thompson at bham.ac.uk> To: gpfsug main discussion list <gpfsug-discuss at gpfsug.org> Date: 19-07-15 04:09 PM Subject: Re: [gpfsug-discuss] Immutable fileset features Sent by: gpfsug-discuss-bounces at gpfsug.org On 19/07/2015 13:45, "Frank Kraemer" <kraemerf at de.ibm.com> wrote: >>I was wondering if anyone had looked at the immutable fileset features in >4.1.1? > >yes, Nils Haustein has see: > >https://www.ibm.com/developerworks/community/blogs/storageneers/entry/Insi >ght_to_the_IBM_Spectrum_Scale_GPFS_Immutability_function I was re-reading some of this blog post and am a little confused. It talks about setting retention times by setting the ATIME from touch, or by using -E to mmchattr. Does that mean if a file is accessed, then the ATIME is updated and so the retention period is changed? What if our retention policy is based on last access time of file +period of time. I was thinking it would be useful to do a policy scan to find newly access files and then set the retention (either directly by policy if possible? Or by passing the file list to a script). Would this work or if the ATIME is overloaded, then I guess we can¹t use this? Finally, is this a feature that is supported by IBM? The -E flag for mmchattr is neither in the man page nor the online docs at: http://www-01.ibm.com/support/knowledgecenter/#!/STXKQY_4.1.1/com.ibm.spect rum.scale.v4r11.adm.doc/bl1adm_mmchattr.htm (My possibly incorrect understanding was that if its documented, then is supported, otherwise it might work)? Simon _______________________________________________ gpfsug-discuss mailing list gpfsug-discuss at gpfsug.org http://gpfsug.org/mailman/listinfo/gpfsug-discuss -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://gpfsug.org/pipermail/gpfsug-discuss_gpfsug.org/attachments/20150720/88e8d62c/attachment.html> -------------- next part -------------- A non-text attachment was scrubbed... Name: graycol.gif Type: image/gif Size: 105 bytes Desc: not available URL: <http://gpfsug.org/pipermail/gpfsug-discuss_gpfsug.org/attachments/20150720/88e8d62c/attachment.gif>
