# AUTHOR <EMAIL@ADDRESS>, YEAR.
# 
msgid ""
msgstr ""
"Project-Id-Version: Fedora Virtualization Guide\n"
"POT-Creation-Date: 2011-03-02T01:07:51\n"
"PO-Revision-Date: 2011-08-21 06:14+0000\n"
"Last-Translator: Automatically generated\n"
"Language-Team: Persian (http://www.transifex.net/projects/p/fedora/team/fa/)\n"
"MIME-Version: 1.0\n"
"Content-Type: text/plain; charset=UTF-8\n"
"Content-Transfer-Encoding: 8bit\n"
"Language: fa\n"
"Plural-Forms: nplurals=1; plural=0\n"

#. Tag: title
#, no-c-format
msgid "KVM guest timing management"
msgstr ""

#. Tag: para
#, no-c-format
msgid ""
"Virtualization poses various challenges for guest time keeping. Guests which"
" use the Time Stamp Counter (TSC) as a clock source may suffer timing issues"
" as some CPUs do not have a constant Time Stamp Counter. Guests without "
"accurate timekeeping may have issues with some networked applications and "
"processes as the guest will run faster or slower than the actual time and "
"fall out of synchronization."
msgstr ""

#. Tag: para
#, no-c-format
msgid ""
"KVM works around this issue by providing guests with a para-virtualized "
"clock. Alternatively, some guests may use other x86 clock sources for their "
"timing in future versions of those operating systems."
msgstr ""

#. Tag: para
#, no-c-format
msgid ""
"Guests can have several problems caused by inaccurate clocks and counters:"
msgstr ""

#. Tag: para
#, no-c-format
msgid ""
"Clocks can fall out of synchronization with the actual time which "
"invalidates sessions and affects networks."
msgstr ""

#. Tag: para
#, no-c-format
msgid "Guests with slower clocks may have issues migrating."
msgstr ""

#. Tag: para
#, no-c-format
msgid ""
"These problems exist on other virtualization platforms and timing should "
"always be tested."
msgstr ""

#. Tag: title
#, no-c-format
msgid "NTP"
msgstr ""

#. Tag: para
#, no-c-format
msgid ""
"The Network Time Protocol (NTP) daemon should be running on the host and the"
" guests. Enable the <systemitem class=\"daemon\">ntpd</systemitem> service:"
msgstr ""

#. Tag: screen
#, no-c-format
msgid "# service ntpd start\n"
msgstr ""

#. Tag: para
#, no-c-format
msgid "Add the ntpd service to the default startup sequence:"
msgstr ""

#. Tag: screen
#, no-c-format
msgid "# chkconfig ntpd on\n"
msgstr ""

#. Tag: para
#, no-c-format
msgid ""
"Using the <systemitem class=\"daemon\">ntpd</systemitem> service should "
"minimize the affects of clock skew in all cases."
msgstr ""

#. Tag: title
#, no-c-format
msgid "Determining if your CPU has the constant Time Stamp Counter"
msgstr ""

#. Tag: para
#, no-c-format
msgid ""
"Your CPU has a constant Time Stamp Counter if the "
"<computeroutput>constant_tsc</computeroutput> flag is present. To determine "
"if your CPU has the <computeroutput>constant_tsc</computeroutput> flag run "
"the following command:"
msgstr ""

#. Tag: screen
#, no-c-format
msgid "$ cat /proc/cpuinfo | grep constant_tsc\n"
msgstr ""

#. Tag: para
#, no-c-format
msgid ""
"If any output is given your CPU has the "
"<computeroutput>constant_tsc</computeroutput> bit. If no output is given "
"follow the instructions below."
msgstr ""

#. Tag: title
#, no-c-format
msgid "Configuring hosts without a constant Time Stamp Counter"
msgstr ""

#. Tag: para
#, no-c-format
msgid ""
"Systems without constant time stamp counters require additional "
"configuration. Power management features interfere with accurate time "
"keeping and must be disabled for guests to accurately keep time with KVM."
msgstr ""

#. Tag: title
#, no-c-format
msgid "Note"
msgstr ""

#. Tag: para
#, no-c-format
msgid "These instructions are for AMD revision F cpus only."
msgstr ""

#. Tag: para
#, no-c-format
msgid ""
"If the CPU lacks the <computeroutput>constant_tsc</computeroutput> bit, "
"disable all power management features (<ulink "
"url=\"https://bugzilla.redhat.com/show_bug.cgi?id=513138\">BZ#513138</ulink>)."
" Each system has several timers it uses to keep time. The TSC is not stable "
"on the host, which is sometimes caused by <command>cpufreq</command> "
"changes, deep C state, or migration to a host with a faster TSC. Deep C "
"sleep states can stop the TSC. To prevent the kernel using deep C states "
"append <command>processor.max_cstate=1</command> to the kernel boot options "
"in the <filename>grub.conf</filename> file on the host:"
msgstr ""

#. Tag: screen
#, no-c-format
msgid ""
"term Red Hat Enterprise Linux (2.6.32-36.x86-64)\n"
"        root (hd0,0)\n"
"\tkernel /vmlinuz-2.6.32-36.x86-64 ro root=/dev/VolGroup00/LogVol00 rhgb quiet <emphasis>processor.max_cstate=1</emphasis>\n"
"\t"
msgstr ""

#. Tag: para
#, no-c-format
msgid ""
"Disable <command>cpufreq</command> (only necessary on hosts without the "
"<command>constant_tsc</command>) by editing the "
"<filename>/etc/sysconfig/cpuspeed</filename> configuration file and change "
"the <command>MIN_SPEED</command> and <command>MAX_SPEED</command> variables "
"to the highest frequency available. Valid limits can be found in the "
"<filename>/sys/devices/system/cpu/cpu*/cpufreq/scaling_available_frequencies</filename>"
" files."
msgstr ""

#. Tag: title
#, no-c-format
msgid "Using the para-virtualized clock with Red Hat Enterprise Linux guests"
msgstr ""

#. Tag: para
#, no-c-format
msgid ""
"For certain Red Hat Enterprise Linux guests, additional kernel parameters "
"are required. These parameters can be set by appending them to the end of "
"the /kernel line in the /boot/grub/grub.conf file of the guest."
msgstr ""

#. Tag: para
#, no-c-format
msgid ""
"The table below lists versions of Red Hat Enterprise Linux and the "
"parameters required for guests on systems without a constant Time Stamp "
"Counter."
msgstr ""

#. Tag: segtitle
#, no-c-format
msgid "Red Hat Enterprise Linux"
msgstr ""

#. Tag: segtitle
#, no-c-format
msgid "Additional guest kernel parameters"
msgstr ""

#. Tag: seg
#, no-c-format
msgid "5.4 AMD64/Intel 64 with the para-virtualized clock"
msgstr ""

#. Tag: seg
#, no-c-format
msgid "Additional parameters are not required"
msgstr ""

#. Tag: seg
#, no-c-format
msgid "5.4 AMD64/Intel 64 without the para-virtualized clock"
msgstr ""

#. Tag: seg
#, no-c-format
msgid "divider=10 notsc lpj=n"
msgstr ""

#. Tag: seg
#, no-c-format
msgid "5.4 x86 with the para-virtualized clock"
msgstr ""

#. Tag: seg
#, no-c-format
msgid "5.4 x86 without the para-virtualized clock"
msgstr ""

#. Tag: seg
#, no-c-format
msgid "divider=10 clocksource=acpi_pm lpj=n"
msgstr ""

#. Tag: seg
#, no-c-format
msgid "5.3 AMD64/Intel 64"
msgstr ""

#. Tag: seg
#, no-c-format
msgid "divider=10 notsc"
msgstr ""

#. Tag: seg
#, no-c-format
msgid "5.3 x86"
msgstr ""

#. Tag: seg
#, no-c-format
msgid "divider=10 clocksource=acpi_pm"
msgstr ""

#. Tag: seg
#, no-c-format
msgid "4.8 AMD64/Intel 64"
msgstr ""

#. Tag: seg
#, no-c-format
msgid "notsc divider=10"
msgstr ""

#. Tag: seg
#, no-c-format
msgid "4.8 x86"
msgstr ""

#. Tag: seg
#, no-c-format
msgid "clock=pmtmr divider=10"
msgstr ""

#. Tag: seg
#, no-c-format
msgid "3.9 AMD64/Intel 64"
msgstr ""

#. Tag: seg
#, no-c-format
msgid "3.9 x86"
msgstr ""

#. Tag: title
#, no-c-format
msgid ""
"Using the Real-Time Clock with Windows Server 2003 and Windows XP guests"
msgstr ""

#. Tag: para
#, no-c-format
msgid ""
"Windows uses the both the Real-Time Clock (RTC) and the Time Stamp Counter "
"(TSC). For Windows guests the Real-Time Clock can be used instead of the TSC"
" for all time sources which resolves guest timing issues."
msgstr ""

#. Tag: para
#, no-c-format
msgid ""
"To enable the Real-Time Clock for the "
"<computeroutput>PMTIMER</computeroutput> clock source (the "
"<computeroutput>PMTIMER</computeroutput> usually uses the TSC) add the "
"following line to the Windows boot settings. Windows boot settings are "
"stored in the boot.ini file. Add the following line to the "
"<filename>boot.ini</filename> file:"
msgstr ""

#. Tag: screen
#, no-c-format
msgid "/use pmtimer\n"
msgstr ""

#. Tag: para
#, no-c-format
msgid ""
"For more information on Windows boot settings and the pmtimer option, refer "
"to <ulink url=\"http://support.microsoft.com/kb/833721\">Available switch "
"options for the Windows XP and the Windows Server 2003 Boot.ini "
"files</ulink>."
msgstr ""

#. Tag: title
#, no-c-format
msgid ""
"Using the Real-Time Clock with Windows Vista, Windows Server 2008 and "
"Windows 7 guests"
msgstr ""

#. Tag: para
#, no-c-format
msgid ""
"The <filename>boot.ini</filename> file is no longer used from Windows Vista "
"and newer. Windows Vista, Windows Server 2008 and Windows 7 use the "
"<application>Boot Configuration Data Editor</application> "
"(<command>bcdedit.exe</command>) to modify the Windows boot parameters."
msgstr ""

#. Tag: para
#, no-c-format
msgid ""
"This procedure is only required if the guest is having time keeping issues. "
"Time keeping issues may not affect guests on all host systems."
msgstr ""

#. Tag: para
#, no-c-format
msgid "Open the Windows guest."
msgstr ""

#. Tag: para
#, no-c-format
msgid ""
"Open the <guimenuitem>Accessories</guimenuitem> menu of the "
"<guimenuitem>start</guimenuitem> menu. Right click on the "
"<application>Command Prompt</application> application, select <guilabel>Run "
"as Administrator</guilabel>."
msgstr ""

#. Tag: para
#, no-c-format
msgid "Confirm the security exception, if prompted."
msgstr ""

#. Tag: para
#, no-c-format
msgid ""
"Set the boot manager to use the platform clock. This should instruct Windows"
" to use the PM timer for the primary clock source. The system UUID "
"(<parameter>{default}</parameter> in the example below) should be changed if"
" the system UUID is different than the default boot device."
msgstr ""

#. Tag: screen
#, no-c-format
msgid ""
"C:\\Windows\\system32&gt;bcdedit /set {default} USEPLATFORMCLOCK on\n"
"The operation completed successfully"
msgstr ""

#. Tag: para
#, no-c-format
msgid ""
"This fix should improve time keeping for Windows Vista, Windows Server 2008 "
"and Windows 7 guests."
msgstr ""