Hi, The thing I want an understanding of is, if my file is say striped across OSTs, number of getattr() calls will be equivalent to the number of OSTs if I am opening a single file. I observed that there is 1 open and close op in the ganglia monitoring page on MDT but getattr calls are 10 for the same time. I am unable to understand the reason for this.
Thanks and Regards, Prakrati From: Patrick Farrell [mailto:[email protected]] Sent: Wednesday, January 20, 2016 9:26 AM To: Agrawal, Prakrati PTIN-PTT/ICOE; [email protected] Subject: RE: When is getattr() called Getattr is returning file attributes, so it's going to be called as part of any browsing (ls, depending on options) or scanning (find, du, or perhaps RobinHood) of the file system. Also, many libraries will do getattr calls before doing an open, as part of sanity checking a file. - Patrick ________________________________ From: lustre-discuss [[email protected]] on behalf of [email protected]<mailto:[email protected]> [[email protected]] Sent: Tuesday, January 19, 2016 9:49 PM To: [email protected]<mailto:[email protected]> Subject: [lustre-discuss] When is getattr() called Hi, I was looking at the MDT parameters on Ganglia and there is a graph which shows getattr calls and that is very high as compared to open and close calls. Under what scenarios, is getattr called. Thanks and Regards, Prakrati
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