Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
> -----Original Message----- > From: drbd-user-bounces at lists.linbit.com > [mailto:drbd-user-bounces at lists.linbit.com] On Behalf Of Weilin Gong > Sent: Wednesday, February 21, 2007 1:11 PM > Cc: drbd-user at lists.linbit.com > Subject: Re: [DRBD-user] Performance with DRBD + iSCSI > > Ross S. W. Walker wrote: > > You can only write into drbd using what your application > can handle and > > for VFS file operations that is 4k io! > On Solaris ufs, the "maxcontig" parameter can be tuned to specify the > the number of contiguous > blocks written to the disk. Haven't found the equivalence on > Linux yet. Well, if you write your own app you can bypass VFS page-memory io restriction by using the generic block layer. I'm not sure if you quite understand the maxcontig parameter either: maxcontig=n The maximum number of logical blocks, belonging to one file, that are allocated contiguously. The default is calculated as follows... This parameter is for tuning disk space allocation in order to reduce fragmentation, it doesn't affect the io block size. -Ross ______________________________________________________________________ This e-mail, and any attachments thereto, is intended only for use by the addressee(s) named herein and may contain legally privileged and/or confidential information. If you are not the intended recipient of this e-mail, you are hereby notified that any dissemination, distribution or copying of this e-mail, and any attachments thereto, is strictly prohibited. If you have received this e-mail in error, please immediately notify the sender and permanently delete the original and any copy or printout thereof.