similar to: combining --preallocate and --fuzzy

When I use the preallocate patch and create a 77GB file using the function I get a CPU spike on the server-side. The spike lasts about 20 minutes and uses about 20%-25% of the cpu associated with the rsync instance creating the file. The spike is directly linked to the time it takes to create the file. I compiled rsync using cygwin CVS. I initially suspected the implementation of

I've been running some tests on files created by rsync and noticing fragmentation issues. I started the testing because our 5TB array started performing very slowly and it appears fragmentation was the culprit. The test I conducted was straighforward: 1. Copy over a 49GB file. Analyzed with contig (from sysinternals), no fragments. 2. Ran rsync and the file was recreated normally (rsync

Wayne.my vote is for a command-line option. I've noticed there is some penalty for very large files (35GB-50GB). The penalty is relatively small based on my 'intuitive' measurements.read me watching without running a real timer. The difference is very small compared to what happens after a few weeks without the fragmentation patch. Our SAN was becoming so fragmented that we were

I believe that the changes to support --preallocate and --sparse together have broken --preallocate by itself (commit f3873b3d88b61167b106e7b9227a20147f8f6197) The previous behavior of --preallocate was to do just that: reserve blocks in the filesystem WITHOUT setting the size of the file to the final length. The reported filesize would change as the preallocated blocks were actually written.

https://bugzilla.samba.org/show_bug.cgi?id=8775 Summary: Preallocate option doesn't work with recursive? Product: rsync Version: 3.1.0 Platform: x64 OS/Version: Linux Status: NEW Severity: normal Priority: P5 Component: core AssignedTo: wayned at samba.org ReportedBy: wgordonharris at

Hi All I was reading through this: http://kashyapc.com/2011/12/02/little-more-disk-io-perf-improvement-with-fallocateing-a-qcow2-disk/ I was basically searching for pointers on improving disk I/O. I wanted to know the purpose of preallocation=full & preallocation=metadata , What is the difference between them ? and which one would yield a better disk I/O speed ? Appreciate your

On Thu, Mar 29, 2018 at 1:59 PM Richard W.M. Jones <rjones@redhat.com> wrote: > I found another problem which is sort of related to this thread. I > hit a time-out waiting for the disk to be unlocked after creation: > > > https://github.com/libguestfs/libguestfs/commit/8081f54105bd990233f166170890192c1fd7d1f3#diff-5ca47c29ae13efa3959b8b28cf4dbd31R112 > line 112 > >

https://bugzilla.samba.org/show_bug.cgi?id=11588 Bug ID: 11588 Summary: missing option: preallocate for all files except for sparse Product: rsync Version: 3.1.2 Hardware: x64 OS: Linux Status: NEW Severity: enhancement Priority: P5 Component: core

I've read in Phil Spector's new book that it's a good idea to preallocate a big matrix, like u <- matrix(0,nrow,ncol) # (1) Now, I read contents of a huge matrix from a Fortran binary dump. u <- readBin(con,what="double",n=nrow*ncol) # (2) If I do (1) and then (2), u is a vector, obviously it's either reallocated or its matrix nature is lost -- overridden?

These are the ways that occur to me. ## This produces a logical vector, which will get converted to a numeric ## vector the first time a number is assigned to it. That seems ## wasteful. x <- rep(NA, n) ## This does the conversion ahead of time but it's still creating a ## logical vector first, which seems wasteful. x <- as.numeric(rep(NA, n)) ## This avoids type conversion but still

fallocate() is linux specific and will preallocate the space on disk for the entire file. FALLOC_FL_KEEP_SIZE does not change the filesize as reported by stat(). An aborted transfer will have preallocated disk space which is not "visible" via stat(). This shouldn't matter unless the user does complet his transfer. An alternative would be to use ftruncate() and shorten the file to the

Does FreeBSD have fallocate(2) or equivalent? On Mon, Oct 30, 2017 at 4:32 PM, Ed Maste <emaste at freebsd.org> wrote: > On 23 October 2017 at 18:49, Rui Ueyama via llvm-dev > <llvm-dev at lists.llvm.org> wrote: > >> > >> BTW, posix_fallocate() might provide better portability and decrease the > >> likelihood of falling back on ftruncate(). > >

Hi, AIX's implementation of posix_fallocate is a little bit, let me say, peculiar. Attached is a patch to "fix" (=work around) this. Without you'll see this in the logs: Jul 28 01:17:41 trevi mail:err|error dovecot: IMAP(beckerr): posix_fallocate() failed: File exists Jul 28 01:17:41 trevi mail:err|error dovecot: IMAP(beckerr): file_set_size() failed with mbox file

-- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones Read my programming blog: http://rwmj.wordpress.com Fedora now supports 80 OCaml packages (the OPEN alternative to F#) http://cocan.org/getting_started_with_ocaml_on_red_hat_and_fedora -------------- next part -------------- >From 557f413e0bd1ad7bd0180ca28a5bfec854f23790 Mon Sep 17 00:00:00 2001 From: Richard

On 10/22/2013 05:56 PM, Gabriel de Perthuis wrote: > --- > pxzcat.c | 5 +++-- > 1 file changed, 3 insertions(+), 2 deletions(-) > > diff --git a/pxzcat.c b/pxzcat.c > index 4ab8689..9bcdc36 100644 > --- a/pxzcat.c > +++ b/pxzcat.c > @@ -29,10 +29,11 @@ > * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT > * OF THE USE OF THIS SOFTWARE,

My production DC machine owns the mail filesystems and is running DC V1.0.15 and mbox folder format. I am looking to test V1.1.3 on another machine, which NFS mounts the mail filesystems, but has its own local index FS. I have made this test environment my default connection in TBird, and it seems to work just fine. Also, I have made sure that my TBird client isn't connecting to the

On Wed, Oct 23, 2013 at 03:38:30AM +0100, Pádraig Brady wrote: [...] By the way, Eric Sandeen solved the problem. It's a genuine misfeature in ext4 called auto_da_alloc which causes a flush on close if the file has been truncated (ftruncate or O_TRUNC) and the file size is zero bytes. I added these patches which work around the issue:

Hi, on a clustered Dovecot server installation that was recently moved from a shared GPFS filesystem to GFS2, occasional corruptions in the users' INBOXes started appearing, where a new incoming message would be appended directly after a block of NUL bytes, and be scanned by dovecot as being glued to the preceding message. I traced this to the file extension operation performed in

--- pxzcat.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/pxzcat.c b/pxzcat.c index 4ab8689..9bcdc36 100644 --- a/pxzcat.c +++ b/pxzcat.c @@ -29,10 +29,11 @@ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ +#define _GNU_SOURCE #include <config.h>

On Mon, Oct 23, 2017 at 3:40 PM, Brian Cain <brian.cain at gmail.com> wrote: > > > On Mon, Oct 23, 2017 at 5:21 PM, Rui Ueyama via llvm-dev < > llvm-dev at lists.llvm.org> wrote: > >> If your system does not support fallocate(2), we use ftruncate(2) to >> create an output file. fallocate(2) succeeds even if your disk have less >> space than the