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Am 27.05.2014 15:03, schrieb Stefan G. Weichinger: |
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>> way too slow ... |
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> |
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> I think I have some IO-topic going on ... very likely some mismatch of |
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> block sizes ... |
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> |
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> the hw-raid, then LVM, then the snapshot on top of that ... and a |
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> filesystem with properties as target ... oh my. |
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> |
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> Chosing noop as IO-scheduler helps a bit but maybe I have to roll back |
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> and rebuild one of the HW-RAID-Arrays with a different blocksize. |
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back from short vacation and re-attacking this one ... |
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I am not sure if I set up the HW-RAIDs correctly and want to move data |
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away from the LVM (yes, again) to try to rebuild the array /dev/sdc |
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I have: |
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# lsblk -o NAME,FSTYPE,UUID,SIZE,TYPE,MOUNTPOINT,LABEL,MODEL,PHY-SEC,MIN-IO |
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NAME FSTYPE UUID |
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SIZE TYPE MOUNTPOINT LABEL MODEL PHY-SEC MIN-IO |
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sda btrfs 9133c469-df1e-45f5-a09f-d1b9c75c69da |
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500G disk /mnt/defvol ROOT RAID 5/6 SAS 6G 4096 4096 |
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sdb swap 102d41a8-848d-4525-b39e-d9b543355b71 |
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8G disk [SWAP] SWAP RAID 5/6 SAS 6G 4096 4096 |
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sdc LVM2_member |
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Z2LEVf-ZJch-cqi3-GVob-Jpd2-eweJ-sDtW7H 1,3T disk |
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RAID 5/6 SAS 6G 4096 4096 |
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├─vg01-amhold xfs 96b7395b-6e81-4660-9459-6a7ad83d8861 |
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400G lvm /mnt/amhold AMHOLD 4096 4096 |
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└─vg01-winserver_disk0 |
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244,1G lvm 4096 4096 |
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(sorry for the ugly format ... should I post a URL?) |
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Is the value for PHY-SEC my problem? The 4 MB ... ? |
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- |
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So sdc is a PV in VG vg01 ... which contains a KVM-diskimage |
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/dev/vg01/winserver_disk0 |
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I use the noop scheduler btw ... |
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I try a dd (or ddrescue) from that LV to somewhere else and only get |
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around 1-5 MB/s ... this takes way too long. |
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--- example with external disk as target: |
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ddrescue -v --block-size=4M /dev/vg01/winserver_disk0 |
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/mnt/ext/virt-backup/windows-server/windows-server_vda.img |
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tried local root-fs as target, different block sizes etc. |
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--- |
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The system is an updated and stable gentoo amd64 box -> |
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# emerge --info |
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Portage 2.2.8-r1 (default/linux/amd64/13.0, gcc-4.7.3, glibc-2.17, |
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3.12.21-gentoo-r1 x86_64) |
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================================================================= |
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System uname: |
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Linux-3.12.21-gentoo-r1-x86_64-Intel-R-_Xeon-R-_CPU_E5-2407_0_@_2.20GHz-with-gentoo-2.2 |
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KiB Mem: 16413444 total, 9252100 free |
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KiB Swap: 8388604 total, 8388604 free |
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Timestamp of tree: Tue, 10 Jun 2014 07:30:01 +0000 |
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ld GNU ld (GNU Binutils) 2.23.2 |
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app-shells/bash: 4.2_p45 |
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dev-lang/python: 2.7.6, 3.2.5-r2, 3.3.3 |
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dev-util/cmake: 2.8.11.2 |
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dev-util/pkgconfig: 0.28 |
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sys-apps/baselayout: 2.2 |
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sys-apps/openrc: 0.12.4 |
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sys-apps/sandbox: 2.6-r1 |
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sys-devel/autoconf: 2.69 |
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sys-devel/automake: 1.13.4 |
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sys-devel/binutils: 2.23.2 |
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sys-devel/gcc: 4.7.3-r1 |
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sys-devel/gcc-config: 1.7.3 |
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sys-devel/libtool: 2.4.2 |
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sys-devel/make: 3.82-r4 |
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sys-kernel/linux-headers: 3.13 (virtual/os-headers) |
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sys-libs/glibc: 2.17 |
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Repositories: gentoo hiro-oops-intern |
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ACCEPT_KEYWORDS="amd64" |
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ACCEPT_LICENSE="* -@EULA" |
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CBUILD="x86_64-pc-linux-gnu" |
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CFLAGS="-march=corei7-avx -O2 -pipe" |
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CHOST="x86_64-pc-linux-gnu" |
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CONFIG_PROTECT="/etc /usr/share/gnupg/qualified.txt" |
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CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/env.d /etc/gconf |
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/etc/gentoo-release /etc/revdep-rebuild /etc/sandbox.d /etc/terminfo" |
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CXXFLAGS="-march=corei7-avx -O2 -pipe" |
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DISTDIR="/usr/portage/distfiles" |
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FCFLAGS="-O2 -pipe" |
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FEATURES="assume-digests binpkg-logs config-protect-if-modified |
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distlocks ebuild-locks fixlafiles merge-sync news notitles |
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parallel-fetch preserve-libs protect-owned sandbox sfperms strict |
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unknown-features-warn unmerge-logs unmerge-orphans userfetch userpriv |
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usersandbox usersync" |
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FFLAGS="-O2 -pipe" |
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GENTOO_MIRRORS="http://distfiles.gentoo.org" |
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LANG="de_DE.UTF-8" |
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LDFLAGS="-Wl,-O1 -Wl,--as-needed" |
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MAKEOPTS="-j5" |
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PKGDIR="/var/portage/packages" |
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PORTAGE_CONFIGROOT="/" |
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PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times |
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--omit-dir-times --compress --force --whole-file --delete --stats |
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--human-readable --timeout=180 --exclude=/distfiles --exclude=/local |
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--exclude=/packages" |
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PORTAGE_TMPDIR="/var/tmp" |
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PORTDIR="/usr/portage" |
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PORTDIR_OVERLAY="/usr/local/portage" |
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SYNC="rsync://172.32.99.6/gentoo-portage" |
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USE="acl amd64 berkdb bzip2 cli cracklib crypt cxx dri fortran gdbm |
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iconv ipv6 mmx modules multilib ncurses nls nptl openmp pam pcre |
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readline session sse sse2 ssl systemd tcpd udev unicode zlib" |
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ABI_X86="64" ALSA_CARDS="ali5451 als4000 atiixp atiixp-modem bt87x |
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ca0106 cmipci emu10k1x ens1370 ens1371 es1938 es1968 fm801 hda-intel |
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intel8x0 intel8x0m maestro3 trident usb-audio via82xx via82xx-modem |
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ymfpci" APACHE2_MODULES="alias cgi headers filter deflate perl" |
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CALLIGRA_FEATURES="kexi words flow plan sheets stage tables krita karbon |
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braindump author" CAMERAS="ptp2" COLLECTD_PLUGINS="df interface irq load |
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memory rrdtool swap syslog" CURL_SSL="openssl" |
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DRACUT_MODULES="biosdevname btrfs caps lvm mdraid" ELIBC="glibc" |
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GPSD_PROTOCOLS="ashtech aivdm earthmate evermore fv18 garmin garmintxt |
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gpsclock itrax mtk3301 nmea ntrip navcom oceanserver oldstyle oncore |
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rtcm104v2 rtcm104v3 sirf superstar2 timing tsip tripmate tnt ublox ubx" |
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INPUT_DEVICES="keyboard mouse evdev" KERNEL="linux" LCD_DEVICES="bayrad |
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cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" |
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LIBREOFFICE_EXTENSIONS="presenter-console presenter-minimizer" |
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OFFICE_IMPLEMENTATION="libreoffice" PHP_TARGETS="php5-5" |
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PYTHON_SINGLE_TARGET="python2_7" PYTHON_TARGETS="python2_7 python3_3" |
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RUBY_TARGETS="ruby19 ruby20" USERLAND="GNU" VIDEO_CARDS="fbdev glint |
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intel mach64 mga nouveau nv r128 radeon savage sis tdfx trident vesa via |
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vmware dummy v4l" XTABLES_ADDONS="quota2 psd pknock lscan length2 |
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ipv4options ipset ipp2p iface geoip fuzzy condition tee tarpit sysrq |
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steal rawnat logmark ipmark dhcpmac delude chaos account" |
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Unset: CPPFLAGS, CTARGET, EMERGE_DEFAULT_OPTS, INSTALL_MASK, LC_ALL, |
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PORTAGE_BUNZIP2_COMMAND, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, |
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PORTAGE_RSYNC_EXTRA_OPTS, USE_PYTHON |
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Taking the hardware it should be much much faster, right? |
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I would appreciate some hints to debug this. |
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Maybe I have to remove the OS and the VM again and rebuild the RAIDs |
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from scratch ... |
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thanks, Stefan |
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