{"action":"opened","issue":{"url":"https://api.github.com/repos/visit-dav/issues-test/issues/1045","repository_url":"https://api.github.com/repos/visit-dav/issues-test","labels_url":"https://api.github.com/repos/visit-dav/issues-test/issues/1045/labels{/name}","comments_url":"https://api.github.com/repos/visit-dav/issues-test/issues/1045/comments","events_url":"https://api.github.com/repos/visit-dav/issues-test/issues/1045/events","html_url":"https://github.com/visit-dav/issues-test/issues/1045","id":337149130,"node_id":"MDU6SXNzdWUzMzcxNDkxMzA=","number":1045,"title":"VisIt slow on start up with tens of thousands of files in a directory on LC systems","user":{"login":"aowen87","id":11658578,"node_id":"MDQ6VXNlcjExNjU4NTc4","avatar_url":"https://avatars0.githubusercontent.com/u/11658578?v=4","gravatar_id":"","url":"https://api.github.com/users/aowen87","html_url":"https://github.com/aowen87","followers_url":"https://api.github.com/users/aowen87/followers","following_url":"https://api.github.com/users/aowen87/following{/other_user}","gists_url":"https://api.github.com/users/aowen87/gists{/gist_id}","starred_url":"https://api.github.com/users/aowen87/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/aowen87/subscriptions","organizations_url":"https://api.github.com/users/aowen87/orgs","repos_url":"https://api.github.com/users/aowen87/repos","events_url":"https://api.github.com/users/aowen87/events{/privacy}","received_events_url":"https://api.github.com/users/aowen87/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":{"login":"brugger1","id":1102718,"node_id":"MDQ6VXNlcjExMDI3MTg=","avatar_url":"https://avatars2.githubusercontent.com/u/1102718?v=4","gravatar_id":"","url":"https://api.github.com/users/brugger1","html_url":"https://github.com/brugger1","followers_url":"https://api.github.com/users/brugger1/followers","following_url":"https://api.github.com/users/brugger1/following{/other_user}","gists_url":"https://api.github.com/users/brugger1/gists{/gist_id}","starred_url":"https://api.github.com/users/brugger1/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/brugger1/subscriptions","organizations_url":"https://api.github.com/users/brugger1/orgs","repos_url":"https://api.github.com/users/brugger1/repos","events_url":"https://api.github.com/users/brugger1/events{/privacy}","received_events_url":"https://api.github.com/users/brugger1/received_events","type":"User","site_admin":false},"assignees":[{"login":"brugger1","id":1102718,"node_id":"MDQ6VXNlcjExMDI3MTg=","avatar_url":"https://avatars2.githubusercontent.com/u/1102718?v=4","gravatar_id":"","url":"https://api.github.com/users/brugger1","html_url":"https://github.com/brugger1","followers_url":"https://api.github.com/users/brugger1/followers","following_url":"https://api.github.com/users/brugger1/following{/other_user}","gists_url":"https://api.github.com/users/brugger1/gists{/gist_id}","starred_url":"https://api.github.com/users/brugger1/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/brugger1/subscriptions","organizations_url":"https://api.github.com/users/brugger1/orgs","repos_url":"https://api.github.com/users/brugger1/repos","events_url":"https://api.github.com/users/brugger1/events{/privacy}","received_events_url":"https://api.github.com/users/brugger1/received_events","type":"User","site_admin":false}],"milestone":null,"comments":0,"created_at":"2018-06-29T21:57:19Z","updated_at":"2018-06-29T21:57:19Z","closed_at":null,"author_association":"CONTRIBUTOR","body":"Greg Burton (burton29@llnl.gov) reported that VisIt takes a long time to start up when starting VisIt in a directory with tens of thousands of files. He observed that \"ls\" is also slow and thinks our use of \"ls\" may be the problem. He mentioned that \"\\ls\" doesn't have this problem. Here is his e-mail:\r\n\r\nHi Eric, Brad and Cyrus,\r\n\r\nDo you recall each of you helping me with the very long hangs I was experiencing when I tried starting up VisIt?  We tried a bunch of things, none of which worked.  I think Iâve found the problem, at least a likely cause of the problem, which may suggest a path to fixing it.  \r\n\r\nAll of my work is with very large parallel computing, which typically generates tens of thousands of files in any given directory.  When I launch VisIt in those directories with all those files, VisIt hangs for a long time (typically minutes, not seconds).  When I launch in a parent directory with few files, it starts up like a charm.  I note that the operating system on the LC machines hangs for minutes at a time when I do simple unix commands like âlsâ, etc in those file-heavy directories.  It simply canât go through all those file quickly.   I suspect that during start-up VisIt is using some unix command that the system canât process in any reasonable time.  \r\n\r\nGiven that VisIt is a great tool for parallel post-processing, it seems like a major bug that it canât start up in a reasonable amount of time in precisely those directories where a massive number of files exist from large parallel runs.\r\n\r\nJust a thought.\r\n\r\nBest,\r\nGreg\r\n\r\nHere is a follow on e-mail:\r\n\r\nWhat about adding an initial backslash character before the unix command (like: â\\lsâ) in your VisIt start-up routines?  I do this when I want a listing of the directory files without the long hangs for the regular ls command to complete.\r\n\r\nGreg\n\n\n\n-----------------------REDMINE MIGRATION-----------------------\nThis ticket was migrated from Redmine. The following information\ncould not be accurately captured in the new ticket:\n\nOriginal author: Eric Brugger\nOriginal creation: 11/18/2010 12:55 pm\nOriginal update: 12/07/2010 12:25 pm\nTicket number: 484"}}
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