similar to: CentOS on SSDs...

Hey, I''ve been trying to get the gplpv drivers working with Windows 2008 R2 64-bit on both a stock CentOS 5.8 install and CentOS 5.8 w/ Xen 4.1.2 from the gitco repos. I''m getting a BSOD shortly after boot up and it can be seen at http://techmonkeys.org/xen/ -- along with the qemu log. Has anyone had success with these drivers and Windows 2008 R2 64-bit? If so, what am I

John R Pierce wrote: > On 9/9/2017 9:47 AM, hw wrote: >> >> Isn?t it easier for SSDs to write small chunks of data at a time? >> The small chunk might fit into some free space more easily than >> a large one which needs to be spread out all over the place. > > > the SSD collects data blocks being written and when a full flash block worth of data is collected,

Hi Everyone, We are thinking of venturing into the world of hosting Windows DomUs on our Xen infrastructure. As Windows generally requires a lot more IOPS than Linux does, we are trying to do everything we can to improve performance. While using SSDs would solve the IOPS problem, SSDs suffer from limited write cycles. So, we have the idea of using Flashcache from Facebook to use a single SSD as

Stephen John Smoogen wrote: > On 13 September 2017 at 09:25, hw <hw at gc-24.de> wrote: >> John R Pierce wrote: >>> >>> On 9/9/2017 9:47 AM, hw wrote: >>>> >>>> >>>> Isn?t it easier for SSDs to write small chunks of data at a time? >>>> The small chunk might fit into some free space more easily than >>>> a

Hi all, are there any plans that future versions of mkfs.btrfs will do an initial pre-discard for SSDs? (AFAIK mkfs.btrfs does not do this currently) For Ext4, mke2fs does this with the -E discard option. From the mke2fs manpage: -E discard Attempt to discard blocks at mkfs time (discarding blocks initially is useful on solid state devices and sparse / thin-provisioned storage). When

Does BTRFS perform any journal and/or filesystem structure alignment (for benefit to SSD longevity and SSD, RAID array and large-sector device performance) at present? ext4''s Ted Tso will deliver 128KB alignment with the next release of e2fsprogs (ie 1.41.4) [1], so perhaps it''s a good idea for btrfsprogs also, if not already available? Daniel --- [1]

Hey, anyone using an LSI MegaRAID experienced "disappearing drives"...? We installed 6 new C6 servers, each with a Supermicro SMC2108 (LSI MegaRAID) controllers and 3 PX-128M5Pro SSDs ( RAID1 + hostswap). 2 weeks (and almost no activity on it, since not in production, apart from installation) later, megacli sees (based on the slot numbers): - on one server: only the 2nd disk of the RAID

I'm trying to clone a volume in a storage pool and I'm following the steps described here: http://libvirt.org/docs/libvirt-appdev-guide-python/en-US/html/libvirt_application_development_guide_using_python-Storage_Pools-Cloning.html My code looks like: destXML = """ <volume>

Hi there, Is there a utility to create an EXT3 file system image from directories? Just like the mkfs.jffs2 which creates a JFFS2 file system image from directories? The "mke2fs -j" only creates the bare bone file system, what I want is to build an image with pre-built content. Thanks, Debbie

I think I must be missing something obvious, but I'm having trouble getting a data transformation to work on groupings of data within a data frame (csss3) as defined by 2 factors (population, locid). The data are sorted by year within locid within population and I want to lag another variable (dbc), i.e, shift them down by 1 row replacing the first row with NA, within groups defined by

On Fri, Feb 19, 2016 at 12:12 PM, Martin Kletzander <mkletzan@redhat.com> wrote: > On Fri, Feb 19, 2016 at 11:12:32AM +0000, Andrei Perietanu wrote: > >> I'm trying to clone a volume in a storage pool and I'm following the steps >> described here: >> >>

Hi, i try to create a openWRT Samba 4.3 package and stumbled across the fact that samba 4.3 will create those message socks inside the private-dir. That results in creating entries inside /etc/samba/msg.sock. On openWRT /var is a tempFS in ram, so anything there is not a problem regarding nvram and wear leveling. Yet the root uses a jffs2 overlay. So while those message socks have no size, jffs2

Just noticed that I get a similar error about object 'kronecker' in "Matrix" package when trying to load "lme4". So this is a more pervasive problem. Brian Brian S. Cade, PhD U. S. Geological Survey Fort Collins Science Center 2150 Centre Ave., Bldg. C Fort Collins, CO 80526-8818 email: brian_cade@usgs.gov tel: 970 226-9326 ----- Forwarded by Brian S

Hi, as I have learned from the discussion about which SSD to use as ZIL drives, I stumbled across this article, that discusses short stroking for increasing IOPs on SAS and SATA drives: http://www.tomshardware.com/reviews/short-stroking-hdd,2157.html Now, I am wondering if using a mirror of such 15k SAS drives would be a good-enough fit for a ZIL on a zpool that is mainly used for file

I am trying to implement an ANOVA on a pair of quantile regression models in R. The anova.rq() function performs a basic check to see whether the models are nested, but I think this check is failing in my case. I think my models are nested despite the anova.rqlist() function saying otherwise. Here is an example where the GLM ANOVA regards the models as nested, but the quantile regression ANOVA

On 13 September 2017 at 12:00, hw <hw at gc-24.de> wrote: >> >> It will depend on the type of SSD. Ones with large cache and various >> smarts (SAS Enterprise type) can take many different sizes. For SATA >> ones it depends on what the cache and write of the SSD is and very few >> of them seem to be the same. The SSD also has all kinds of logic which >>

Having finally updated from R 1.91 to R 2.2.0 with my installation of a new computer, I discovered that something has changed drastically about the way code for contributed packages is stored when installed in a local version of R. In the 1.* versions it was easy for me to go in and modify some of the code for a contributed package by using a text editor to change the script files (these

On 13 September 2017 at 09:25, hw <hw at gc-24.de> wrote: > John R Pierce wrote: >> >> On 9/9/2017 9:47 AM, hw wrote: >>> >>> >>> Isn?t it easier for SSDs to write small chunks of data at a time? >>> The small chunk might fit into some free space more easily than >>> a large one which needs to be spread out all over the place.

On 9/13/2017 9:21 AM, Stephen John Smoogen wrote: > ...The SATA hard drives....[It doesn't matter the brand.. they get built with the same tech and at the same place these days.] thats most assuredly not true.?? HD manufacturing is extremely competitive, there's no WAY they 'are built at the same place'. Each of the few remaining major brands of HD's has their own

On Wed, September 13, 2017 2:16 pm, John R Pierce wrote: > On 9/13/2017 9:21 AM, Stephen John Smoogen wrote: >> ...The SATA hard drives....[It doesn't matter the brand.. they get built >> with the same tech and at the same place these days.] > > > thats most assuredly not true.???? HD manufacturing is extremely > competitive, there's no WAY they 'are built at