In our institution we have an AFS cell with clients and servers distributed over WAN. In the last year the bandwidth of the available WAN connections has been increased up to 1 Gbit/s for some of the sites and it appears that AFS performance over WAN is still limited to about 2-3 MB/s.
I know that this is a well know problem of the rx protocol, as shown for example by Hartmut Reuter at the last European AFS Conference 2008 (see slide 49 from http://www.openafs.at/drupal/files/slides/1Day_03/AFS-OSD.pdf), due to the fixed rx window size and combined with network latencies in the order of tenths of milliseconds. I am aware that an activity was in progress for a tcp version of openafs, which probably could solve some of this problem, but I do not know what is the status of this activity. More generally, what are the plans to increase the AFS performances over WAN, to take advantage of the present day availability of high bandwith connections? Can someone comment about that? Giovanni -- Giovanni Bracco ENEA FIM (Servizio Informatica e Reti) Via E. Fermi 45 I-00044 Frascati (Roma) Italy phone 00-39-06-9400-5597 FAX 00-39-06-9400-5735 E-mail [EMAIL PROTECTED] WWW http://www.afs.enea.it/bracco _______________________________________________ OpenAFS-info mailing list [email protected] https://lists.openafs.org/mailman/listinfo/openafs-info
