similar to: How to set a minimum ARC size?

One thing I''ve been confused about for a long time is the relationship between ZFS, the ARC, and the page cache. We have an application that''s a quasi-database. It reads files by mmap()ing them. (writes are done via write()). We''re talking 100TB of data in files that are 100k->50G in size (the files have headers to tell the app what segment to map, so mapped chunks

Hi all I ran a workload that reads & writes within 10 files each file is 256M, ie, (10 * 256M = 2.5GB total Dataset Size). I have set the ARC max size to 1 GB on etc/system file In the worse case, let us assume that the whole dataset is hot, meaning my workingset size= 2.5GB My SSD flash size = 8GB and being used for L2ARC No slog is used in the pool My File system record size = 8K ,

Hi ZFSers, I''ve been working on merging the Joyent arcstat enhancements with some of my own and am now to the point where it is time to broaden the requirements gathering. The result is to be merged into the illumos tree. arcstat is a perl script to show the value of ARC kstats as they change over time. This is similar to the ideas behind mpstat, iostat, vmstat, and friends. The current

Hello, How do you tell how much of your l2arc is populated? I''ve been looking for a while now, can''t seem to find it. Must be easy, as this blog entry shows it over time: http://blogs.sun.com/brendan/entry/l2arc_screenshots And follow up, can you tell how much of each data set is in the arc or l2arc? -- This message posted from opensolaris.org

I''m running into a issue where there seems to be a high number of read iops hitting disks and physical free memory is fluctuating between 200MB -> 450MB out of 16GB total. We have the l2arc configured on a 32GB Intel X25-E ssd and slog on another32GB X25-E ssd. According to our tester, Oracle writes are extremely slow (high latency). Below is a snippet of iostat: r/s w/s

Dear Sir/Madam, I have only started using a R-written script for modeling the distribution of disease vector species. Part of the script is to make a large GIS grid for use with GIS software, but it seems I have a memory problem. I get the following message: Reached total allocation of 1535Mb: see help(memory.size) My hard disk has more than 100 gigabytes available, I just have to increase the

Greeting All I have create a pool that consists oh a hard disk and a ssd as a cache zpool create hdd c11t0d0p3 zpool add hdd cache c8t0d0p0 - cache device I ran an OLTP bench mark to emulate a DMBS One I ran the benchmark, the pool started create the database file on the ssd cache device ??????????? can any one explain why this happening ? is not L2ARC is used to absorb the evicted data

Hello all, A few months ago I saw a statement that L2ARC writes are simplistic in nature, and I got the (mis?)understanding that some sort of ring buffer may be in use, like for ZIL. Is this true, and the only metric of write-performance important for L2ARC SSD device is the sequential write bandwidth (and IOPS)? In particular, there are some SD/MMC/CF cards for professional photography and

Hi Pete, > https://reviews.llvm.org/D36331 Congratulations! > Following shortly: > * Clang driver and target triple support. great, then it is able to generate ELF by $ /opt/llvm-svn/bin/clang -c --target=arc hello.c -o hello.o -mmcu=XXX and do you plan to implement ARC target for lld[1]? it is a good testcase: flash them directly to the chip[2], or simulator[3]. 1. ARC

Hi Pete, Thanks for your kind response! I migrated AVR target for lld https://reviews.llvm.org/D32991 it is very beginning, only support R_AVR_CALL reloc, and ARC is more complex than AVR, I will learn it from binutils, also ARC related doc, then try to implement it. 发自我的iPhone ------------------ Original ------------------ From: Pete Couperus <Peter.J.Couperus at synopsys.com> Date:

Hello everyone, I'm trying to compile my test.cpp for ARC, using this guide https://clang.llvm.org/docs/CrossCompilation.html. I've built my LLVM+CLANG with ARC, ARM and X86. clang -target arc -S test.cpp Gives me: error: unknown target triple 'arc', please use -triple or -arch clang -targer arm works fine Is there any way to compile for ARC? -------------- next part

On Thu, Mar 05, 2020 at 04:59:29PM +0100, Thomas Zimmermann wrote: > The arc driver uses empty implementations for its encoders. Replace > the code with the generic simple encoder. We should , as a follow-up patch, embed the encoder in arcgpu_drm_private. Then we drop the kzalloc() and avoid that life-time challenge. This patch looks good for what it does. Acked-by: Sam Ravnborg <sam

Pre-fletching on the file and device level has been disabled yielding good results so far. We''ve lowered the number of concurrent ios from 35 to 1 causing the service times to go even lower (1 -> 8ms) but inflating actv (.4 -> 2ms). I''ve followed your recommendation in setting primarycache to metadata. I''ll have to check with our tester in the morning if it made

Moved from PSARC to zfs-code...this discussion is seperate from the case. Eric kustarz wrote: > > On Jun 23, 2008, at 1:20 PM, Darren Reed wrote: > >> eric kustarz wrote: >>> >>> On Jun 23, 2008, at 1:07 PM, Darren Reed wrote: >>> >>>> Tim Haley wrote: >>>>> .... >>>>> primarycache=all | none | metadata

I had high hopes of significant performance gains using zfs diff in Solaris 11 compared to my home-brew stat based version in Solaris 10. However the results I have seen so far have been disappointing. Testing on a reasonably sized filesystem (4TB), a diff that listed 41k changes took 77 minutes. I haven''t tried my old tool, but I would expect the same diff to take a couple of

I have some questions about the choice of SSDs to use for ZIL and L2ARC. I''m trying to build an OpenSolaris iSCSI SAN out of a whitebox system, which is intended to be used as a backup SAN during storage migration, so it''s built on a tight budget. The system currently has 4GB RAM, 3GHz Core2-Quad and 8x 500GB WD REII SATA HDDs attached to an Areca 8port ARC-1220 controller

Oh, that's what I was afraid of. So there is definetly no way to compile for ARC? If so, should I write ARC.h(.cpp) in lib/Basic/Targets in order to make it work? чт, 27 сент. 2018 г. в 14:47, Tim Northover <t.p.northover at gmail.com>: > Hi, > > On Thu, 27 Sep 2018 at 12:41, Павел Безбородов via llvm-dev > <llvm-dev at lists.llvm.org> wrote: > > clang -target

Recently we have started using Arc serve backup. The Arc server and the tape library are connected to a Windows 2000 server machine and the data files are stored on many Samba file servers. I have Linux Client Agents installed on all Linux Machine. Now the problem is that when Arc Serve backup the file it always backup the full files irrespective of setting for a differential backup. I think

Recently we have started using Arc serve backup. The Arc server and the tape library are connected to a Windows 2000 server machine and the data files are stored on many Samba file servers. I have Linux Client Agents installed on all Linux Machine. Now the problem is that when Arc Serve backup the file it always backup the full files irrespective of setting for a differential backup. I think

Hi all, The Phabricator docs seem to say that downloading a patch goes with `arc patch`. However, I tried it on several revisions and they all fail with: Checking patch some/path/to/a/file/that/exists ... error: some/path/to/a/file/that/exists: does not exist in index With the svn repo I found that command to be really useful. But now it seems like I have to download the patch manually, create