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virsh: add compression options for migration

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Signed-off-by: Nikolay Shirokovskiy <nshirokovskiy@virtuozzo.com>
This commit is contained in:
ShaoHe Feng 2016-04-14 13:33:52 +03:00 committed by Jiri Denemark
parent 061e24285f
commit 0d81f2318b
2 changed files with 91 additions and 3 deletions
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76
tools/virsh-domain.c
View File

@ -9783,6 +9783,26 @@ static const vshCmdOptDef opts_migrate[] = {
.type = VSH_OT_BOOL,
.help = N_("compress repeated pages during live migration")
},
{.name = "comp-methods",
.type = VSH_OT_STRING,
.help = N_("comma separated list of compression methods to be used")
},
{.name = "comp-mt-level",
.type = VSH_OT_INT,
.help = N_("compress level for multithread compression")
},
{.name = "comp-mt-threads",
.type = VSH_OT_INT,
.help = N_("number of compession threads for multithread compression")
},
{.name = "comp-mt-dthreads",
.type = VSH_OT_INT,
.help = N_("number of decompession threads for multithread compression")
},
{.name = "comp-xbzrle-cache",
.type = VSH_OT_INT,
.help = N_("page cache size for xbzrle compression")
},
{.name = "auto-converge",
.type = VSH_OT_BOOL,
.help = N_("force convergence during live migration")
@ -9863,6 +9883,9 @@ doMigrate(void *opaque)
virTypedParameterPtr params = NULL;
int nparams = 0;
int maxparams = 0;
int intOpt = 0;
unsigned long long ullOpt = 0;
int rv;
virConnectPtr dconn = data->dconn;
sigemptyset(&sigmask);
@ -9930,6 +9953,59 @@ doMigrate(void *opaque)
VIR_FREE(val);
}
if (vshCommandOptStringReq(ctl, cmd, "comp-methods", &opt) < 0)
goto out;
if (opt) {
char **val = virStringSplit(opt, ",", 0);
if (virTypedParamsAddStringList(&params,
&nparams,
&maxparams,
VIR_MIGRATE_PARAM_COMPRESSION,
(const char **)val) < 0) {
VIR_FREE(val);
goto save_error;
}
VIR_FREE(val);
}
if ((rv = vshCommandOptInt(ctl, cmd, "comp-mt-level", &intOpt)) < 0) {
goto out;
} else if (rv > 0) {
if (virTypedParamsAddInt(&params, &nparams, &maxparams,
VIR_MIGRATE_PARAM_COMPRESSION_MT_LEVEL,
intOpt) < 0)
goto save_error;
}
if ((rv = vshCommandOptInt(ctl, cmd, "comp-mt-threads", &intOpt)) < 0) {
goto out;
} else if (rv > 0) {
if (virTypedParamsAddInt(&params, &nparams, &maxparams,
VIR_MIGRATE_PARAM_COMPRESSION_MT_THREADS,
intOpt) < 0)
goto save_error;
}
if ((rv = vshCommandOptInt(ctl, cmd, "comp-mt-dthreads", &intOpt)) < 0) {
goto out;
} else if (rv > 0) {
if (virTypedParamsAddInt(&params, &nparams, &maxparams,
VIR_MIGRATE_PARAM_COMPRESSION_MT_DTHREADS,
intOpt) < 0)
goto save_error;
}
if ((rv = vshCommandOptULongLong(ctl, cmd, "comp-xbzrle-cache", &ullOpt)) < 0) {
goto out;
} else if (rv > 0) {
if (virTypedParamsAddULLong(&params, &nparams, &maxparams,
VIR_MIGRATE_PARAM_COMPRESSION_XBZRLE_CACHE,
ullOpt) < 0)
goto save_error;
}
if (vshCommandOptStringReq(ctl, cmd, "xml", &opt) < 0)
goto out;
if (opt) {

18
tools/virsh.pod
View File

@ -1537,11 +1537,14 @@ to the I<uri> namespace is displayed instead of being modified.
=item B<migrate> [I<--live>] [I<--offline>] [I<--direct>] [I<--p2p> [I<--tunnelled>]]
[I<--persistent>] [I<--undefinesource>] [I<--suspend>] [I<--copy-storage-all>]
[I<--copy-storage-inc>] [I<--change-protection>] [I<--unsafe>] [I<--verbose>]
[I<--compressed>] [I<--abort-on-error>] [I<--auto-converge>] [I<--postcopy>]
[I<--abort-on-error>] [I<--auto-converge>] [I<--postcopy>]
[I<--postcopy-after-precopy>] I<domain> I<desturi> [I<migrateuri>]
[I<graphicsuri>] [I<listen-address>] [I<dname>]
[I<--timeout> B<seconds> [I<--timeout-suspend> | I<--timeout-postcopy>]]
[I<--xml> B<file>] [I<--migrate-disks> B<disk-list>] [I<--disks-port> B<port>]
[I<--compressed>] [I<--comp-methods> B<method-list>]
[I<--comp-mt-level>] [I<--comp-mt-threads>] [I<--comp-mt-dthreads>]
[I<--comp-xbzrle-cache>]
Migrate domain to another host. Add I<--live> for live migration; <--p2p>
for peer-2-peer migration; I<--direct> for direct migration; or I<--tunnelled>
@ -1564,8 +1567,7 @@ enforces that no incompatible configuration changes will be made to the domain
while the migration is underway; this flag is implicitly enabled when supported
by the hypervisor, but can be explicitly used to reject the migration if the
hypervisor lacks change protection support. I<--verbose> displays the progress
of migration. I<--compressed> activates compression of memory pages that have
to be transferred repeatedly during live migration. I<--abort-on-error> cancels
of migration. I<--abort-on-error> cancels
the migration if a soft error (for example I/O error) happens during the
migration. I<--auto-converge> forces convergence during live migration.
I<--postcopy> enables post-copy logic in migration, but does not
@ -1602,6 +1604,16 @@ I<--timeout-postcopy> is used, virsh will switch migration from pre-copy
to post-copy upon timeout; migration has to be started with I<--postcopy>
option for this to work.
I<--compressed> activates compression, the compression method is chosen
with I<--comp-methods>. Supported methods are "mt" and "xbzrle" and
can be used in any combination. When no methods are specified, a hypervisor
default methods will be used. QEMU defaults to "xbzrle". Compression methods
can be tuned further. I<--comp-mt-level> sets compression level.
Values are in range from 0 to 9, where 1 is maximum speed and 9 is maximum
compression. I<--comp-mt-threads> and I<--comp-mt-dthreads> set the number
of compress threads on source and the number of decompress threads on target
respectively. I<--comp-xbzrle-cache> sets size of page cache in bytes.
Running migration can be canceled by interrupting virsh (usually using
C<Ctrl-C>) or by B<domjobabort> command sent from another virsh instance.