(Illustration by Gaich Muramatsu)
> -----Messaggio originale----- > Da: Jan Harkes [mailto:jaharkes_at_cs.cmu.edu] > Inviato: martedi 29 maggio 2001 17.21 > A: Mourad De Clerck > Cc: codalist_at_coda.cs.cmu.edu > Oggetto: Re: coda questions... > > > * i've heard that coda doesn't scale so well - is this true? > > Scalability is relative. A Coda server can currently handle many > clients, and lots of data, but not a lot of files, or many files per > directory. The limitations that I've seen hit are around 150000-200000 > files for every 100MB of configured RVM. Because of 32-bit address space > limitations it is not realistic to run a server with more than 1-2GB of > RVM, in which case the server would also need at least the same amount > of virtual memory (real + swap). Extending this, a Coda server would max > out at around 2 million files. Other problems are likely to hit before > this time, such as excessively long server-startup times. Directories > tend to fill up with as few as 4000 names. About scalability, I have few questions. We have two coda servers (replicated) with a lot of space: from my tests I noticed it's a preferrable solution a lot of servers (processes, I mean) instead of just one. So: Pentium XEON 500Mhz, 2Gb RAM, 88 Gb space 13 coda srv (1 main, used only for internal, 12 for services directories, like /coda/apache, /coda/qmail, and so on) each servers handle 6gb of space, with 30mb rvm. It can be a good solution? In such this way, I can add other NIC to load the traffic between IPS changing only where each coda src is bindind. > > * is there a specific filesystem recommendation for use with coda? > > (ext2, reiser, xfs) > > As far as Coda clients are concerned, ext2 has been used the most and > works well. ReiserFS is not supported by anything but recent Linux > kernels (2.4.4 and later). I haven't looked at XFS yet, so it could > still have problems. I'm running ext3 both client / server, if it can interest :). And for my point of view, Coda is a stable fs, with a lot of features, and it can be used in a production environment (with some limitation due to the hard link not allowed). --- Cordiali saluti / Best regards Andrea Cerrito ^^^^^^^^^^^^^^ Net.Admin @ Centro MultiMediale di Terni S.p.A. P.zzale Bosco 3A 05100 Terni IT Tel. +39 744 5441330 Fax. +39 744 5441372Received on 2001-05-29 15:40:10