Re: [libvirt] [PATCH v4 5/5] virsh: add compression options for migration

From: ShaoHe Feng <shaohe.feng(a)intel.com&gt; Signed-off-by: Nikolay Shirokovskiy <nshirokovskiy(a)virtuozzo.com&gt; --- tools/virsh-domain.c | 83 ++++++++++++++++++++++++++++++++++++++++++++++++++++ tools/virsh.pod | 25 ++++++++++++---- 2 files changed, 103 insertions(+), 5 deletions(-) diff --git a/tools/virsh-domain.c b/tools/virsh-domain.c index 979f115..6dd8eca 100644 --- a/tools/virsh-domain.c +++ b/tools/virsh-domain.c @@ -9666,6 +9666,31 @@ static const vshCmdOptDef opts_migrate[] = { .type = VSH_OT_STRING, .help = N_("comma separated list of disks to be migrated") }, + {.name = "compression-method",

+ .type = VSH_OT_STRING, + .help = N_("comma separated list of compression method to be used")

+ }, + {.name = "compression-mt-level",

+ .type = VSH_OT_INT, + .help = N_("compress level for multithread compression. "

+ "Values are in range 0-9, 9 means maximum compression. " + "'multithread' compression method must be selected with this option.") + }, + {.name = "compression-mt-threads", + .type = VSH_OT_INT, + .help = N_("number of compession threads from multithread compression. "

+ "'multithread' compression method must be selected with this option.") + }, + {.name = "compression-mt-dthreads", + .type = VSH_OT_INT, + .help = N_("number of decompession threads from multithread compression. "

+ "'multithread' compression method must be selected with this option.") + }, + {.name = "compression-xbzrle-cache", + .type = VSH_OT_INT, + .help = N_("page cache size for xbzrle compression. "

+ "'xbzrle' compression method must be selected with this option.") + }, {.name = NULL} }; @@ -9684,6 +9709,9 @@ 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); @@ -9744,6 +9772,61 @@ doMigrate(void *opaque) VIR_FREE(val); } + if (vshCommandOptStringReq(ctl, cmd, "compression-method", &opt) < 0) + goto out; + if (opt) { + char **val = NULL; + + 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, "compression-mt-level", &intOpt)) < 0) { + goto save_error;

+ } 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, "compression-mt-threads", &intOpt)) < 0) { + goto save_error;

+ } 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, "compression-mt-dthreads", &intOpt)) < 0) { + goto save_error;

+ } 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, "compression-xbzrle-cache", &ullOpt)) < 0) { + goto save_error;

+ } 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) { diff --git a/tools/virsh.pod b/tools/virsh.pod index 4662658..854c7ae 100644 --- a/tools/virsh.pod +++ b/tools/virsh.pod @@ -1532,7 +1532,9 @@ to the I<uri> namespace is displayed instead of being modified. [I<--compressed>] [I<--abort-on-error>] [I<--auto-converge>] I<domain> I<desturi> [I<migrateuri>] [I<graphicsuri>] [I<listen-address>] [I<dname>] [I<--timeout> B<seconds>] [I<--xml> B<file>] -[I<--migrate-disks> B<disk-list>] +[I<--migrate-disks> B<disk-list>] [I<--compression-method> B<method-list>] +[I<--compression-mt-level>] [I<--compression-mt-threads>] [I<--compression-mt-dthreads>] +[I<--compression-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> @@ -1555,10 +1557,14 @@ 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 -the migration if a soft error (for example I/O error) happens during the -migration. I<--auto-converge> forces convergence during live migration. +of migration. I<--compressed> activates default compression method +during 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<--compression-methods> +configures compression methods to use during migration in the comma separated +B<method-list> argument. Compression methods are driver specific. +Compression methods can be tuned further using various [--<compression-*>] +options.

B<Note>: Individual hypervisors usually do not support all possible types of migration. For example, QEMU does not support direct migration. @@ -1594,6 +1600,15 @@ managed migration. B<Note>: The I<desturi> parameter for normal migration and peer2peer migration has different semantics: +QEMU supports "multithread" and "xbzrle" methods which can be used in any +combination. I<--compression-mt-level> sets compression level for multithread +method. Values are in range from 0 to 9, where 1 is maximum speed and 9 is maximum +compression. I<--compression-mt-threads> and I<--compression-mt-dthreads> set +the number of compress threads on source and the number of decompress threads +on target respectively. I<--compression-xbzrle-cache> sets size of page cache in +bytes for xbzrle method. I<--compressed> turns on "xbzrle" compression method with +current compression parameters.