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qmp-commands: move 'query-migrate' doc to schema

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Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
This commit is contained in:
Marc-André Lureau 2016-06-23 10:24:07 +02:00 committed by Markus Armbruster
parent 66c2f5a56c
commit 104b1caf05
2 changed files with 114 additions and 170 deletions
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169
docs/qmp-commands.txt
View file

@ -2458,175 +2458,6 @@ Example:
]
}
query-migrate
-------------
Migration status.
Return a json-object. If migration is active there will be another json-object
with RAM migration status and if block migration is active another one with
block migration status.
The main json-object contains the following:
- "status": migration status (json-string)
- Possible values: "setup", "active", "completed", "failed", "cancelled"
- "total-time": total amount of ms since migration started. If
migration has ended, it returns the total migration
time (json-int)
- "setup-time" amount of setup time in milliseconds _before_ the
iterations begin but _after_ the QMP command is issued.
This is designed to provide an accounting of any activities
(such as RDMA pinning) which may be expensive, but do not
actually occur during the iterative migration rounds
themselves. (json-int)
- "downtime": only present when migration has finished correctly
total amount in ms for downtime that happened (json-int)
- "expected-downtime": only present while migration is active
total amount in ms for downtime that was calculated on
the last bitmap round (json-int)
- "ram": only present if "status" is "active", it is a json-object with the
following RAM information:
- "transferred": amount transferred in bytes (json-int)
- "remaining": amount remaining to transfer in bytes (json-int)
- "total": total amount of memory in bytes (json-int)
- "duplicate": number of pages filled entirely with the same
byte (json-int)
These are sent over the wire much more efficiently.
- "skipped": number of skipped zero pages (json-int)
- "normal" : number of whole pages transferred. I.e. they
were not sent as duplicate or xbzrle pages (json-int)
- "normal-bytes" : number of bytes transferred in whole
pages. This is just normal pages times size of one page,
but this way upper levels don't need to care about page
size (json-int)
- "dirty-sync-count": times that dirty ram was synchronized (json-int)
- "disk": only present if "status" is "active" and it is a block migration,
it is a json-object with the following disk information:
- "transferred": amount transferred in bytes (json-int)
- "remaining": amount remaining to transfer in bytes json-int)
- "total": total disk size in bytes (json-int)
- "xbzrle-cache": only present if XBZRLE is active.
It is a json-object with the following XBZRLE information:
- "cache-size": XBZRLE cache size in bytes
- "bytes": number of bytes transferred for XBZRLE compressed pages
- "pages": number of XBZRLE compressed pages
- "cache-miss": number of XBRZRLE page cache misses
- "cache-miss-rate": rate of XBRZRLE page cache misses
- "overflow": number of times XBZRLE overflows. This means
that the XBZRLE encoding was bigger than just sent the
whole page, and then we sent the whole page instead (as as
normal page).
Examples:
1. Before the first migration
-> { "execute": "query-migrate" }
<- { "return": {} }
2. Migration is done and has succeeded
-> { "execute": "query-migrate" }
<- { "return": {
"status": "completed",
"ram":{
"transferred":123,
"remaining":123,
"total":246,
"total-time":12345,
"setup-time":12345,
"downtime":12345,
"duplicate":123,
"normal":123,
"normal-bytes":123456,
"dirty-sync-count":15
}
}
}
3. Migration is done and has failed
-> { "execute": "query-migrate" }
<- { "return": { "status": "failed" } }
4. Migration is being performed and is not a block migration:
-> { "execute": "query-migrate" }
<- {
"return":{
"status":"active",
"ram":{
"transferred":123,
"remaining":123,
"total":246,
"total-time":12345,
"setup-time":12345,
"expected-downtime":12345,
"duplicate":123,
"normal":123,
"normal-bytes":123456,
"dirty-sync-count":15
}
}
}
5. Migration is being performed and is a block migration:
-> { "execute": "query-migrate" }
<- {
"return":{
"status":"active",
"ram":{
"total":1057024,
"remaining":1053304,
"transferred":3720,
"total-time":12345,
"setup-time":12345,
"expected-downtime":12345,
"duplicate":123,
"normal":123,
"normal-bytes":123456,
"dirty-sync-count":15
},
"disk":{
"total":20971520,
"remaining":20880384,
"transferred":91136
}
}
}
6. Migration is being performed and XBZRLE is active:
-> { "execute": "query-migrate" }
<- {
"return":{
"status":"active",
"capabilities" : [ { "capability": "xbzrle", "state" : true } ],
"ram":{
"total":1057024,
"remaining":1053304,
"transferred":3720,
"total-time":12345,
"setup-time":12345,
"expected-downtime":12345,
"duplicate":10,
"normal":3333,
"normal-bytes":3412992,
"dirty-sync-count":15
},
"xbzrle-cache":{
"cache-size":67108864,
"bytes":20971520,
"pages":2444343,
"cache-miss":2244,
"cache-miss-rate":0.123,
"overflow":34434
}
}
}
migrate-set-capabilities
------------------------

115
qapi-schema.json
View file

@ -655,11 +655,124 @@
##
# @query-migrate:
#
# Returns information about current migration process.
# Returns information about current migration process. If migration
# is active there will be another json-object with RAM migration
# status and if block migration is active another one with block
# migration status.
#
# Returns: @MigrationInfo
#
# Since: 0.14.0
#
# Example:
#
# 1. Before the first migration
#
# -> { "execute": "query-migrate" }
# <- { "return": {} }
#
# 2. Migration is done and has succeeded
#
# -> { "execute": "query-migrate" }
# <- { "return": {
# "status": "completed",
# "ram":{
# "transferred":123,
# "remaining":123,
# "total":246,
# "total-time":12345,
# "setup-time":12345,
# "downtime":12345,
# "duplicate":123,
# "normal":123,
# "normal-bytes":123456,
# "dirty-sync-count":15
# }
# }
# }
#
# 3. Migration is done and has failed
#
# -> { "execute": "query-migrate" }
# <- { "return": { "status": "failed" } }
#
# 4. Migration is being performed and is not a block migration:
#
# -> { "execute": "query-migrate" }
# <- {
# "return":{
# "status":"active",
# "ram":{
# "transferred":123,
# "remaining":123,
# "total":246,
# "total-time":12345,
# "setup-time":12345,
# "expected-downtime":12345,
# "duplicate":123,
# "normal":123,
# "normal-bytes":123456,
# "dirty-sync-count":15
# }
# }
# }
#
# 5. Migration is being performed and is a block migration:
#
# -> { "execute": "query-migrate" }
# <- {
# "return":{
# "status":"active",
# "ram":{
# "total":1057024,
# "remaining":1053304,
# "transferred":3720,
# "total-time":12345,
# "setup-time":12345,
# "expected-downtime":12345,
# "duplicate":123,
# "normal":123,
# "normal-bytes":123456,
# "dirty-sync-count":15
# },
# "disk":{
# "total":20971520,
# "remaining":20880384,
# "transferred":91136
# }
# }
# }
#
# 6. Migration is being performed and XBZRLE is active:
#
# -> { "execute": "query-migrate" }
# <- {
# "return":{
# "status":"active",
# "capabilities" : [ { "capability": "xbzrle", "state" : true } ],
# "ram":{
# "total":1057024,
# "remaining":1053304,
# "transferred":3720,
# "total-time":12345,
# "setup-time":12345,
# "expected-downtime":12345,
# "duplicate":10,
# "normal":3333,
# "normal-bytes":3412992,
# "dirty-sync-count":15
# },
# "xbzrle-cache":{
# "cache-size":67108864,
# "bytes":20971520,
# "pages":2444343,
# "cache-miss":2244,
# "cache-miss-rate":0.123,
# "overflow":34434
# }
# }
# }
#
##
{ 'command': 'query-migrate', 'returns': 'MigrationInfo' }