search for: sequential

Displaying 20 results from an estimated 1538 matches for "sequential".

2007 Jan 11
4
Help understanding some benchmark results
...Linux "RAID50" and "RAID60", I created two RAID5 and RAID6 arrays, respectively, then create a RAID0 array over the top of them. For "RAID10" I used the ''builtin'' RAID10.) Single drive bonnie++ -d /mnt/ -s 8g -u0 -f Version 1.03 ------Sequential Output------ --Sequential Input- --Random- -Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks-- Machine Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP /sec %CP csmith-desktop 8G 42807 21 25278 7 65191 6 11...
2003 Apr 06
1
Priority usage: absolute sequential vs. sequential
...se numbers as well (but see my other email of a few minutes ago as to how this might be removed altogether.) Anyway, I had the same headache with Cisco access lists many, many years ago when I was learning those syntaxes. Then I discovered that those access lists didn't have to be exactly sequential; they could simply be generally sequential, meaning that instead of 1 followed by 2 followed by 3, they could be 10 followed by 20 followed by 30. Then, when I wanted to insert something between 10 and 20, I would simply call it "15" and it would Just Work. Granted, that only left m...
2008 Mar 04
5
7.0-Release and 3ware 9550SXU w/BBU - horrible write performance
...from bonnie: File ''./Bonnie.2551'', size: 104857600 Writing with putc()...done Rewriting...done Writing intelligently...done Reading with getc()...done Reading intelligently...done Seeker 1...Seeker 2...Seeker 3...start ''em...done...done...done... -------Sequential Output-------- ---Sequential Input-- --Random-- -Per Char- --Block--- -Rewrite-- -Per Char- --Block--- --Seeks--- Machine MB K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU /sec %CPU 100 9989 4.8 6739 1.0 18900 7.8 225973 98.5 1914662 99...
2017 Dec 01
0
How to extract coefficients from sequential (type 1), ANOVAs using lmer and lme
...s are always marginal (cf. Pinheiro and Bates 2000, pp. 90-91). I would also encourage you to focus more on your estimates (the Value column) and less on p-values. All that said, it seems you only care about the significance of model terms and not the estimates, so there are two possibilities for sequential tests: 1. Nested model comparison (likelihood-ratio test) with either the anova() function or drop1(model,test='Chisq') 2. use the p-values from the ANOVA results (see Pinheiro and Bates 2000, pp. 90-91, for some notes on which test is preferred as well as the GLMM FAQ: https://b...
2017 Nov 29
0
How to extract coefficients from sequential (type 1), ANOVAs using lmer and lme
(This time with the r-help in the recipients...) Be careful when mixing lme4 and lmerTest together -- lmerTest extends and changes the behavior of various lme4 functions. >From the help page for lme4-anova (?lme4::anova.merMod) > ?anova?: returns the sequential decomposition of the contributions > of fixed-effects terms or, for multiple arguments, model > comparison statistics. For objects of class ?lmerMod? the > default behavior is to refit the models with ML if fitted > with ?REML = TRUE?, this can b...
2006 Jul 17
11
ZFS bechmarks w/8 disk raid - Quirky results, any thoughts?
...n once. 8GB should be far more then the 1GB of RAM that the system has, eliminating caching issues. If I''ve still managed to overlook something in my testing setup, please let me know - I sure did try! Sorry about the formatting - this is bound to end up ugly Bonnie -------Sequential Output-------- ---Sequential Input-- --Random-- -Per Char- --Block--- -Rewrite-- -Per Char- --Block--- --Seeks--- raid0 MB K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU /sec %CPU 8 disk 8196 78636 93.0 261804 64.2 125585 25.6 72160 95.3 246172 19...
2007 May 29
6
NCQ performance
I''ve been looking into the performance impact of NCQ. Here''s what i found out: http://blogs.sun.com/erickustarz/entry/ncq_performance_analysis Curiously, there''s not too much performance data on NCQ available via a google search ... enjoy, eric
2007 Feb 26
15
Efficiency when reading the same file blocks
if you have N processes reading the same file sequentially (where file size is much greater than physical memory) from the same starting position, should I expect that all N processes finish in the same time as if it were a single process? In other words, if you have one process that reads blocks from a file, is it "free" (meaning no additiona...
2004 Jul 14
2
ext3 performance with hardware RAID5
...FS. For these tests I created a 256MB partition in the mirrored disk set for the log device: /dev/sdb6. The RAID5 volume is a 500GB partition: /dev/sda1. Here is a summary of the results: Log location: - log location does not affect the file system performance as measured by the sequential output and sequential input tests - random seek rate improves with an external log (25%) - log location affects the random create "create" test results and has a massive impact on the random create "read" and "delete" test results Data journaling: - data journaling do...
2020 Aug 07
3
[PATCH nbdkit] file: Implement cache=none and fadvise=normal|random|sequential.
...of random data on a machine with about 32 GB of RAM. At the beginning of the test I evicted the file from the page cache: $ cachedel /var/tmp/random $ cachestats /var/tmp/random pages in cache: 0/8388608 (0.0%) [filesize=33554432.0K, pagesize=4K] Performing a normal sequential copy of the file to /dev/null shows that the file is almost entirely pulled into page cache (thus evicting useful programs and data): $ free -m; time ./nbdkit file /var/tmp/random --run 'qemu-img convert -n -p -m 16 -W $nbd "json:{\"file.driver\":\"n...
2007 Nov 26
4
Filesystem for Maildir
...S seems to had better or equivalent performance on Read and Create Random files. One of this tests, using bonnie++, show this:<br> <br> # bonnie++ -d /mnt/sdc1/testfile -s 8192 -m `hostname` -n 50:150000:5000:1000<br> <br> XFS:<br> Version 1.03 ------Sequential Output------ --Sequential Input- --Random-<br> -Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks--<br> Machine Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP /sec %CP<br> localhost 8G 74048 99 201584 32...
2020 Aug 07
0
Re: [PATCH nbdkit] file: Implement cache=none and fadvise=normal|random|sequential.
...bout 32 GB of RAM. At the > beginning of the test I evicted the file from the page cache: > > $ cachedel /var/tmp/random > $ cachestats /var/tmp/random > pages in cache: 0/8388608 (0.0%) [filesize=33554432.0K, pagesize=4K] > > Performing a normal sequential copy of the file to /dev/null shows > that the file is almost entirely pulled into page cache (thus evicting > useful programs and data): > > $ free -m; time ./nbdkit file /var/tmp/random --run 'qemu-img convert -n -p -m 16 -W $nbd "json:{\"file.dr...
2006 Feb 12
2
Using Random Longer Non-Sequential IDs
Instead of using sequential integers for IDs for my objects I was wondering if I could easily make it so that my IDs where longer auto- generated random strings/integers. So instead of: http://www.mydomain.com/user/view/1 Would be: http://www.mydomain.com/user/view/d81096b87a7...
2017 Nov 27
0
How to extract coefficients from sequential (type 1) ANOVAs using lmer and lme
I wantto run sequential ANOVAs (i.e. type I sums of squares), and trying to getresults including ANOVA tables and associated coefficients for predictive variables(I am using the R 3.4.2 version). I think ANOVA tables look right, but believecoefficients are wrong. Specifically, it looks like that the coefficients arefrom A...
2008 Mar 13
3
Overland Arcvault 12 and sequential/random settings
My unit's firmware: library 05.03, tape d22h, shows the device as set to random mode. But mtx -f /dev/st0 status gives an error that google says the device is in sequential mode. dmesg|grep -i hp does reflect CentOS thinks the device is a sequential unit. I've tried this with Fedora 8, too, and both show the same, so it is either an issue with CentOS/Fedora RPMs, or the version of MTX? I'm going to try a simple install of Ubuntu next and see if there...
2016 Jun 30
2
[cfe-dev] [lldb-dev] Sequential ID Git hook
...ded as > > one component of the version number, and it has been working for us. > > Does that work for sub modules inside the umbrella project? > > How can you trigger a hook in the umbrella project for commits inside the sub modules? > First: This is purely about generating sequential revision numbers, it does not help setting up a server hook to update the submodule references in the meta repository. The point I am trying to make here is that we only need to solve the problem of updating the submodule references, and that generating sequential ID numbers as an alternative to gi...
2016 Jun 30
0
[cfe-dev] [lldb-dev] Sequential ID Git hook
...#39; trick which mainly gets recorded as > one component of the version number, and it has been working for us. Does that work for sub modules inside the umbrella project? How can you trigger a hook in the umbrella project for commits inside the sub modules? Enough people complained about the sequential number, and I'm trying to solve that problem. I particularly have no use for that at all. We can still do the bundling pushes with the same id by adding metadata to the commit message and training our CI, which is orthogonal to this issue. Cheers, Renato -------------- next part -------------...
2016 Jun 30
6
[lldb-dev] Sequential ID Git hook
...that's been discussed > plenty -- but where does the need for a separate "id" that must be pushed > into all of the sub-projects come from? This is the first I've heard of > that as a thing that needs to be done. > > There was a previous discussion about putting an sequential ID in the > "llvm-project" repo commit messages (although, even that I'd say is > unnecessary), but not anywhere else. > Agreed, the llvm-project repository can completely take on the role of the SQL database in Renato's proposal. Chromium created a "git-number&quo...
2003 Jan 14
3
ext3fs still uses sequential search of file names in directories?
I am trying to determine the optimal filesystem for accessing large numbers of files (25,000+) in a single directory. I have read that ext3fs uses a sequential search algorithm and wanted to verify that this was still indeed the case since this article was published a year ago. http://bulmalug.net/body.phtml?nIdNoticia=1154 <http://bulmalug.net/body.phtml?nIdNoticia=1154&nIdPage=7> &nIdPage=7 Thanks for the help....
2009 Dec 17
2
SPLUS Seqtrial vs. R Packages for sequential clinical trials designs
Hello Everyone,   I’m a SAS user who has recently become interested in sequential clinical trials designs. I’ve discovered that the SAS based approaches for these designs are either too costly or are “experimental.” So now I’m looking for alternative software. Two programs that seem promising are SPLUS Seqtrial and R.   I recently obtained a 30 day trial for the SPLUS Seqtrial a...