On Sat, 23 Jul 2011, Bill Hastings wrote: > Hi Sage > > Sorry to send this to you directly. All attempts to send emails to > ceph-devel@xxxxxxxxxxxxxxx are failing for me. Here is my questions: vger throws out all HTML email. Make sure you send in plaintext. > How do writes work in Ceph? If I open a file and write say 255 bytes say > intervals of 10 secs 1000 times. Are small amounts of data cached and then > pushed out to the server? I want to know the flow of the write operation > through the system. The page cache will normally absorb this and write out large chunks. This is governed by the Linux VM, and behavior will be more or less identical to any other file system (ext3, NFS, etc.). > If I am doing a large streaming write are writes chunked the way they are in > HDFS for instance? Ceph (by default) stripes files over 4MB objects. The default policy is configurable on a per-directory or per-file basis. sage -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
