similar to: [PATCH 2/3] Inform kernel of FADV_DONTNEED hint in sender

Use the FADV_DONTNEED fadvise hint after finishing writing to a destinataion fd in the receiver. --- receiver.c | 6 ++++++ 1 files changed, 6 insertions(+), 0 deletions(-) diff --git a/receiver.c b/receiver.c index 39c5e49..33b21fb 100644 --- a/receiver.c +++ b/receiver.c @@ -721,6 +721,12 @@ int recv_files(int f_in, char *local_name) recv_ok = receive_data(f_in, fnamecmp, fd1,

While going through an old todo list I found that these patches had fallen by the way-side. About a year ago I initiated a discussion[1] with the Linux kernel folks regarding the lack of any useable fadvise support on the kernel side. As a result, I was observing extremely poor performance on my server after backup as executable pages were being swapped out in favor of data waiting to be flushed

Some background: I have been assigned a task to implement one-way synchronization of a large file storage to another box. The problem is that on the target box a special directory has to be maintained in which symlinks to received files should be created using special logic. After some experimentation I have set up a named pipe which is used by the receiving rsync daemon for transfer logging;

This mode is useful when a process is monitoring the log for post-processing of transferred files. With --log-after in local mode, both sender and receiver log to the same log file, so it require --log-file with absolute path. We add %o to the default log format, so it will be easy to tell the logs of the sender from the logs of the receiver: 2023/02/14 14:40:25 [559755] building file list

With recent discussion on the LKML[1], it seems likely that Linux will finally support posix_fadvise in a useful way with the FADV_DONTNEED flag. This should allow us to minimize the effect of rsync on the system's working set. Add the necessary wrapper to syscall.c. [1] http://lkml.org/lkml/2010/11/21/59 --- syscall.c | 11 +++++++++++ 1 files changed, 11 insertions(+), 0 deletions(-)

Warning for kernel folks: I'm not much of an mm person; let me know if I got anything horribly wrong. Many folks use rsync in their nightly backup jobs. In these applications, speed is of minimal concern and should be sacrificed in order to minimize the effect of rsync on the rest of the machine. When rsync is working on a large directory it can quickly fill the page cache with written data,

Any votes for/against? ----- Forwarded message from Rik Faith <faith@alephnull.com> ----- Date: Wed, 28 Nov 2001 12:55:29 -0500 From: Rik Faith <faith@alephnull.com> To: mbp@samba.org Subject: rsync patch X-Mailer: VM 6.96; XEmacs 21.1; Linux 2.4.16 (light) Here is a patch that adds rate information (e.g., kB/s) to the --progress display. I just noticed that 2.4.7pre4 is coming

seems the behavior of rsync has changed when dealing with output and using both -v and -q at the same time ... for example: $ mkdir test1 $ touch test1/foo $ rsync-2.6.0 -avq test1 test2 $ rm -r test2 $ rsync-2.6.8 -avq test1 test2 test1/ test1/fo $ rm -r test2 $ rsync-cvs -avq test1 test2 building file list ... test1/ test1/fo $ rm -r test2 the new output in 2.6.8 comes from the calls to

I've recently been trying to track down the root cause of my server's persistent issue of thrashing horribly after being left inactive. It seems that the issue is likely my nightly backup schedule (using rsync) which traverses my entire 50GB home directory. I was surprised to find that rsync does not use fadvise to notify the kernel of its use-once data usage pattern. It looks like a

Hi, I needed to filter content of files (encrypt), before they are sent over the network to backup server. The easiest way to do this was modifying Kyle Jones's "--dest-filter" patch. Somebody was asking there this feature in the past, so I'm sending this patch to list. Implementation details: -filtering disables rsync alogrithm -source filter makes temporary files in /tmp

A recent posting here got me thinking about having the --progress output tell the user about how many files were left to go in the transfer. I submit the attached patch which outputs an extra suffix onto the progress line at the end of each file's transfer (so it only appears once per file, not on every status update). The output would look like this: [...] flist.c 35671 100%

Dear List, the attached patch makes rsync of local folders almost as fast as cp. when rsync client and server has detected that they are working in local_server mode, they use local_socket, a unix domain socket pair, to pass the file descriptors of the synced files. the server uses the file descriptor it receives from the client to fast copy from src to dst file. on completion of every file fast

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,

Hi, I have written a 'smallish' patch to implement the --inplace option as discussed on this mailing list at various points in the past. It makes a small modification to the sender algorithm so that it won't ask the receiver to relocate blocks from earlier in the file when running with the --inplace option. I would appreciate any testing and feedback people can provide! I

https://bugzilla.samba.org/show_bug.cgi?id=11683 Bug ID: 11683 Summary: hang on select when send many files Product: rsync Version: 3.1.2 Hardware: All OS: All Status: NEW Severity: normal Priority: P5 Component: core Assignee: wayned at samba.org Reporter: tom916 at

[ see http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=415648 ] When a source file grows during transfer, rsync may show negative time values such as 0:-1:-34. The following patch replaces then negative times with ??:??:?? in such cases (as IMHO it's not worth the bother of getting the filesize again etc. in such cases, but showing garbage info is wrong as well). Paul Slootman Index:

I've been studying the read and write buffering in rsync and it turns out most I/O is done just a couple of bytes at a time. This means there are lots of system calls, and also most network traffic comprises lots of small packets. The behavior is most extreme when sending/receiving file deltas of identical files. The main case where I/O is buffered is writes from the server (when io

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

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:

--- 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>