similar to: Need for a partial checksums patch?

When a whole-file checksum is performed, hashing was done in 64 byte blocks, causing overhead and limiting performance. Testing showed the performance improvement to go up quickly going from 64 to 512 bytes, with diminishing returns above, 4096 was where it seemed to plateau for me. Re-used CHUNK_SIZE (32 kB) as it already exists and should be fine to use here anyway. Noticed this because

From: Sebastian Andrzej Siewior <sebastian at breakpoint.cc> This is a huge all-in-one patch and deserves a little cleanup and splitting. However, I wanted to get it out here for some feedback. My primar motivation to use SHA1 for checksumming (by default) instead of MD5 is not the additional security bits but performance. On a decent x86 box the SHA1 performance is almost the same as

This is a suggestion for adding to rsync an option "--checksum-path=PROGRAM". Once this option is given, provided it is accompained by option "--checksum", both the receiving and sending side of rsync would compute checksums calling PROGRAM, instead of the usual checksum program. Why is this usefull? Suppose I have two collections of MP3 files at different locations which I

This patch introduces an optimized assembler version of md5_process(), the inner loop of MD5 checksumming. It affects the performance of all MD5 operations in rsync - including block matching and whole-file checksums. Performance gain is 5-10% depending on the specific CPU. Originally created by Marc Bevand and placed in the public domain, later integrated into OpenSSL. This is the original

Wayne, I notice that .rsyncsums is starting to look a lot like the index that the git version control system ( http://git.or.cz/ ) uses to determine whether a file has changed since it was last staged for committing. The git index has been heavily used and tested, so you might find it helpful when implementing a checksum cache for rsync. Specifically, it has protection against being fooled when

http://www.lightreading.com/document.asp?doc_id=73943&site=lightreading I know e911 has been discussed on ths list before, but I just read this and it got me thinking that if you have a Wholesale VoIP carrier - wouldn't they have to pass e911 on to you as a VoIP provider to, in turn, pass on to your end-users? Of course there would be a fee - just wondering if this is how the

Hi, as scanning large repositories for each client connection causes unnecessary CPU/IO load, I want to know if is it possible to generate checksum digest files on the server, meanwhile? Best regards, Renne

Platform: Compaq OpenVMS Alpha 7.3 Compiler: Compaq C T6.5 The following patch resolves compile problems with the checksum.c module. The type (char) was being used where the usage indicated either (void) or (unsigned char) should be used. The const qualifier was added to impove compiler efficiency. There may be more cases in this module where type (char) is being used instead of what appears

Greetings, I'd like to propose a new option to rsync, which causes it to read device files as if they were regular files. This includes pipes, character devices and block devices (I'm not sure about sockets). The main motivation is cases where you need to synchronize a large amount of data that is not available as regular files, as in the following scenarios: * Keep a copy of a block

Hello i had the same problem 2 days ago :) and the nice people here tolt me what to do .. >smbpasswd -a username(valid unix) and then define the password this shuld do the job :) Ps -axe |grep Ketil 79 ? S 1:09 /usr/sbin/klogd -c 3 -x PWD=/ CONSOLE=/dev/console -x (Ketil Braun Larsen) -----Oprindelig meddelelse----- Fra: Leva [mailto:leva@interware.hu] Sendt: 16. marts

Hello all, attached patch implements Compuserve RPA athentication mechanism. Tested with: - Eudora 6 (uses Compuserve "Virtual Key" RPA software); - TheBat! 2.11 (uses it's own RPA implementation). I hope it can be useful for someone. Best regards. -- Andrey Panin | Linux and UNIX system administrator pazke at donpac.ru | PGP key: wwwkeys.pgp.net -------------- next part

I've isolated a bug in SSE codegen to the attached example. define void @f(<2 x float>* %in, <2 x double>* %out) { entry: %0 = load <2 x float>* %in, align 8 %1 = fpext <2 x float> %0 to <2 x double> store <2 x double> %1, <2 x double>* %out, align 1 ret void } The code should load a <2 x float> vector from %in, fpext cast it to

Here is a little patch against 2.9p1 that performs the SNK (also known as TIS authserv) challenge-response automaticly instead of asking the user. hope you find it useful. --larry -------------- next part -------------- diff -NuBw openssh-2.9p1/Makefile.in openssh/Makefile.in --- openssh-2.9p1/Makefile.in Thu Apr 26 20:31:08 2001 +++ openssh/Makefile.in Wed Jun 6 16:15:56 2001 @@ -43,9 +43,9

Hello puppet users, I´de like to switch from md5 checksums to md5lite to save a few cpu cycles on my (overloaded) puppetmaster. so it is just replacing md5 to md5lite within my manifests and I´m done or do I have to keep things like the local clientbucket in mind? are there any procedures/recommondations regarding this? I´m running puppet >= 3.1.x on my puppet minions and master. bye ,

Being new at distro SOPs, I don't know if this is an unusual thought. With a kernel debug package (or any such debug package) would it be prudent in todays world to have a checksum or signature process to assure the downloaded file is untampered with and complete? What prompts this is I just downloaded the kernel packages that Johnny put up. I had not realized they were so large and thought

Hello, A little informal input on the TCP/UDP checksum deferral/offload: it fails for me. I have one Xen host, running a snapshot of xen-unstable at 2006-03-24 (9435:11fee62328cc). Each of its domUs are allocated their own /30, with the help of a hacked-up vif script. Prior to working around the problem, Domain-0 could establish TCP connections to other domains. In the case of SSH, it would

Hi, have you ever considered adding checksums to http://libguestfs.org/download/ (minor request) -- Evaggelos Balaskas - Unix System Engineer http://gr.linkedin.com/in/evaggelosbalaskas

There are known Collision Attacks for the MD5SUM method of hashing, so it is possible to modify a file and make it have the same MD5SUM as another file. See this link for details on Collision Attacks: http://en.wikipedia.org/wiki/Collision_attack Recommendation from the US-CERT concerning MD5SUM hashes: http://www.kb.cert.org/vuls/id/836068 Based on the above information, the CentOS team will

There are known Collision Attacks for the MD5SUM method of hashing, so it is possible to modify a file and make it have the same MD5SUM as another file. See this link for details on Collision Attacks: http://en.wikipedia.org/wiki/Collision_attack Recommendation from the US-CERT concerning MD5SUM hashes: http://www.kb.cert.org/vuls/id/836068 Based on the above information, the CentOS team will

--- builder/checksums.ml | 4 ++++ builder/checksums.mli | 1 + 2 files changed, 5 insertions(+) diff --git a/builder/checksums.ml b/builder/checksums.ml index 73d541f..25b3328 100644 --- a/builder/checksums.ml +++ b/builder/checksums.ml @@ -24,17 +24,21 @@ open Utils open Printf type csum_t = +| SHA256 of string | SHA512 of string let string_of_csum_t = function + | SHA256 _ ->