> Krishna Harathi [khara...@exablox.com] wrote: > > I am trying to determine the relation between the system imposed limit > of > > max FDs (4096 now) and > > the Cache Inode HW Mark (100000 default). > > In a test work load, I am getting errno 24 (too many open files) error > > returned, > > and here is our current settings. > > 15/05/2015 18:48:23 : epoch 5556a1e7 : OneBlox-0333 : > > nfs-ganesha-12814[main] cache_inode_lru_pkginit :INODE LRU :INFO > > :Attempting to increase soft limit from 1024 to hard limit of 4096 > > 15/05/2015 18:48:23 : epoch 5556a1e7 : OneBlox-0333 : > > nfs-ganesha-12814[main] cache_inode_lru_pkginit :INODE LRU :INFO > :Setting > > the system-imposed limit on FDs to 4096 > > I looked at the related code in Cache_inode but could not determine the > > relationship between > > the system limit and cache_inode or how many file FDs Ganesha will try to > > open. > > Any help is (1) What is the system limit to be set, given the default > > cache inode HWmark? > > Cache inode entries can exist without the corresponding file being open. > So I don't think there is a relation between Entries_HWMark and the > number of file descriptors a process can open. > > > (2) For the given system limit, what is the cache inode setting. We are > > using Ganesha 2.1. > > The number of cache entries is probably related to the available system > memory rather than the number of files a process can open. Frank or anyone > else, what is a good value on systems with 128GB or 256GB system memory?
A good number of cache inodes probably depends on a lot of things. One thing to consider is if you have lots of large directories that will be enumerated with READDIR is that you probably need at least twice that many cache inodes to prevent READDIR from upchucking all over the floor. When multiple filedescriptors come in, we will really need to make sure we can have as many open files as possible since there will be lots of extra open files. Frank ------------------------------------------------------------------------------ One dashboard for servers and applications across Physical-Virtual-Cloud Widest out-of-the-box monitoring support with 50+ applications Performance metrics, stats and reports that give you Actionable Insights Deep dive visibility with transaction tracing using APM Insight. http://ad.doubleclick.net/ddm/clk/290420510;117567292;y _______________________________________________ Nfs-ganesha-devel mailing list Nfs-ganesha-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/nfs-ganesha-devel
