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Otherwise there is no way of treating a timeout differently to a
general failure.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Pair-programmed-with: Amitay Isaacs <amitay@gmail.com>
(This used to be ctdb commit 40e34773b8063196457746ffe7a048eb87d96d61)
Otherwise callers can't tell the difference between some other failure
(e.g. memory allocation failure) and an unknown tunable.
Signed-off-by: Martin Schwenke <martin@meltin.net>
(This used to be ctdb commit 03fd90d41f9cd9b8c42dc6b8b8d46ae19101a544)
Also new client function ctdb_ctrl_get_runstate().
Signed-off-by: Martin Schwenke <martin@meltin.net>
(This used to be ctdb commit dc4220e6f618cc688b3ca8e52bcb3eec6cb55bb1)
This was apparently not used before in this context, and the bug hence
not detected. It becomes necessary when ctdb_local_schedule_for_deletion()
is called from a client ctdbd (the vacuuming child), hence needs to send
the SCHEDULE_FOR_DELETION control to its parent.
Pair-Programmed-With: Stefan Metzmacher <metze@samba.org>
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Signed-off-by: Michael Adam <obnox@samba.org>
Reviewed-By: Amitay Isaacs <amitay@gmail.com>
(This used to be ctdb commit e72a5e11845fe445baaee4730bb0bea8588ee9e3)
If the socket is set non-blocking before connect, then we should catch
EAGAIN errors and retry. Instead of adding a random number of retries,
better to wait for connect to succeed and then set the socket to
non-blocking.
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
(This used to be ctdb commit 524ec206e6a5e8b11723f4d8d1251ed5d84063b0)
This reverts commit dc0c58547cd4b20a8e2cd21f3c8363f34fd03e75.
There is a simpler solution that retrying random number of times. Do not set
socket non-blocking till connect succeeds.
(This used to be ctdb commit 74acc2c568300ef42740cf11299a1b2507047f60)
This reduces repetition.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Pair-programmed-with: Amitay Isaacs <amitay@gmail.com>
(This used to be ctdb commit f505020a5720faa4ecc6414e0bfaa6b3c0e47291)
Signed-off-by: Martin Schwenke <martin@meltin.net>
Pair-programmed-with: Amitay Isaacs <amitay@gmail.com>
(This used to be ctdb commit a73bb56991b8c07ed0e9517ffcf0dc264be30487)
Do some other hosuekeeping including stopping tevent.
Pair-programmed-with: Amitay Isaacs <amitay@gmail.com>
Signed-off-by: Martin Schwenke <martin@meltin.net>
(This used to be ctdb commit 212298279557a2833ef0f81809b4a5cdac72ca02)
This can improve performance and stop clients from having to chase a rapidly migrating/bouncing record
(This used to be ctdb commit d0d98f7e45e5084b81335b004d50bddc80cdc219)
This can improve performance slightly on certain workloads where smbds frequently read from the same record
(This used to be ctdb commit 035c0d981bde8c0eee8b3f24ba8e2dc817e5b504)
there are some child processes where we do not create a connection to the main daemon (switch_from_server_to_client()) because it is expensive to set up and we normally might not need to talk to the daemon at all via a domainsocket.
but we might want to still call to ctdb_ltdb_store() from such chil processes.
(This used to be ctdb commit 9e372a08c40087e6b5335aa298e94d88273566a5)
By this, the original CTDB_CONTROL_TRAVERSE_START control that is
used by e.g. samba's smbstatus, is not changed, so that samba
continues working without code change.
The CTDB_CONTROL_TRAVERSE_START currently just adds the "withemptyrecords"
flag to the state and processon on as CTDB_CONTROL_TRAVERSE_START_EXT.
(This used to be ctdb commit 8281bb210858ed04992eacea7f6d02261e0fc1b1)
This will be useful for also printing information about empty/deleted
records in "ctdb catdb", e.g. for debugging vacuuming issues.
(This used to be ctdb commit ddc5da3a0df7701934404192a0a0aa659a806acb)
Rename parameter script_status to scripts to avoid shadowing a global
function with the same name in eventscript.c.
This is in the context of wanting to run CCAN-style tests where most
of the ctdbd code is just included in the test program.
Signed-off-by: Martin Schwenke <martin@meltin.net>
(This used to be ctdb commit 668358057c1e6b9bbad7209212f9135c5e6241a0)
This avoids a name clash with a slightly different function in
ctdb_control.c.
This is in the context of wanting to run CCAN-style tests where most
of the ctdbd code is just included in the test program.
Signed-off-by: Martin Schwenke <martin@meltin.net>
(This used to be ctdb commit 82f6108bfbc7e48ca88650297c6a1c6ede0e1c9c)
Move identical copies of ctdb_null_func(), ctdb_fetch_func(),
ctdb_fetch_with_header_func() from ctdb_client.c and
ctdb_ltdb_server.c to somewhere common.
This is in the context of wanting to run CCAN-style tests where most
of the ctdbd code is just included in the test program.
Signed-off-by: Martin Schwenke <martin@meltin.net>
(This used to be ctdb commit 126cb0d369b2b1aed63801dc4ba0554399e8b7e4)
In a few places functions are called, the return code is assigned into
a variable but it is not checked. This generates a compiler warning
like this:
warning: variable ‘ret’ set but not used [-Wunused-but-set-variable]
Instead we remove the warning by checking the return code variable and
log a warning at DEBUG level if the return code indicates an error.
The justification is that there may have been a future intent to check
the return code but it hasn't been important enough to follow-up. If
it matters, it will be logged for easy debugging.
Signed-off-by: Martin Schwenke <martin@meltin.net>
(This used to be ctdb commit 1932466c76de2b184c2a257120768ab8c9d6c12a)
Remove the code in the example client code that writes the record to the local tdb.
Add code to the local ctdbd processing of replies to check if this reply contain a ro delegation and if so, spawn a child process to lock the tdb and then write the data.
(This used to be ctdb commit bf1d429227dc4f5818263cc39401d0a22663cdba)
Attempt to reconnect to ctdbd on fetch while it is unreachable.
We must provide our own queue callback wrapper, as ctdb_client_read_cb()
exits on transport failure.
(This used to be ctdb commit 28df6fbf1273b8d095a2bc38dca6a6c35c5c31bd)
let all databases default to not support this until enabled through this control
(This used to be ctdb commit 908a07c42e5135a3ba30a625fc4f4e4916de197a)
This function differs from the old FETCH in that this function will also fetch the record header and not just the record data
(This used to be ctdb commit c7196d16e8e03bb2a64be164d15a7502300eae0e)
Client connections to the ctdbd unix domain socket may fail
intermittently while the server is under heavy load. This change
introduces a client connect retry loop.
During failure the client will retry for a maximum of 64 seconds, the
ctdb --timelimit option can be used to cap client runtime.
Signed-off-by: Michael Adam <obnox@samba.org>
(This used to be ctdb commit dc0c58547cd4b20a8e2cd21f3c8363f34fd03e75)
This concept didnt work out and it is really just as expensive as a full migration
anyway, without the benefit of caching the data for subsequence accesses.
Now, migrate the records immediately on first access.
This will be combined with a "cheap vacuum-lite" for special empty records to
prevent growth of databases.
Later extensions to mimic read-only behaviour of records will include proper shared read-only locking of database records, making the laccessor/lacount read-only access to the data obsolete anyway.
By removing this special case and handling of lacount laccessor makes the codapath where shared read-only locking will be be implemented simpler, and frees up space in the ctdb_ltdb header for use by vacuuming flags as well as read-only locking flags.
(This used to be ctdb commit 155dd1f4885fe142c6f8bd09430f65daf8a17e51)
Revert this patch:
commit 482c302d46e2162d0cf552f8456bc49573ae729d
We may need to use real-time processes for the main daemon and the recovery daemon to handle the cases where systems come under very high loads.
(This used to be ctdb commit 08bef9dcab6e4da15fc783f8624e5ed09aa060b5)
Add a new command "ctdb stats [num]" that prints the [num] most recent statistics intervals collected.
(This used to be ctdb commit e6e16fcd5a45ebd3739a8160c8fb5f44494edb9e)