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migration: Improve QMP documentation

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Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
This commit is contained in:
Juan Quintela 2013-02-11 15:11:10 +01:00
parent dcadaa9b40
commit 817c60457f
1 changed files with 32 additions and 22 deletions
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54
qmp-commands.hx
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@ -644,7 +644,7 @@ EQMP
SQMP
migrate-set-cache-size
---------------------
----------------------
Set cache size to be used by XBZRLE migration, the cache size will be rounded
down to the nearest power of 2
@ -667,7 +667,7 @@ EQMP
SQMP
query-migrate-cache-size
---------------------
------------------------
Show cache size to be used by XBZRLE migration
@ -2431,32 +2431,42 @@ The main json-object contains the following:
- Possible values: "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)
time (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)
the last bitmap round (json-int)
- "ram": only present if "status" is "active", it is a json-object with the
following RAM information (in bytes):
- "transferred": amount transferred (json-int)
- "remaining": amount remaining (json-int)
- "total": total (json-int)
- "duplicate": number of duplicated pages (json-int)
- "normal" : number of normal pages transferred (json-int)
- "normal-bytes" : number of normal bytes transferred (json-int)
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.
- "normal" : number of whole pages transfered. 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)
- "disk": only present if "status" is "active" and it is a block migration,
it is a json-object with the following disk information (in bytes):
- "transferred": amount transferred (json-int)
- "remaining": amount remaining (json-int)
- "total": total (json-int)
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
- "bytes": total XBZRLE bytes transferred
- "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 cache misses
- "overflow": number of XBZRLE overflows
- "cache-miss": number 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
@ -2567,11 +2577,11 @@ EQMP
SQMP
migrate-set-capabilities
-------
------------------------
Enable/Disable migration capabilities
- "xbzrle": xbzrle support
- "xbzrle": XBZRLE support
Arguments:
@ -2590,7 +2600,7 @@ EQMP
},
SQMP
query-migrate-capabilities
-------
--------------------------
Query current migration capabilities