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Signed-off-by: Michael Adam <obnox@samba.org>
Reviewed-By: Amitay Isaacs <amitay@gmail.com>
(This used to be ctdb commit a62775334aa20d1d850d2df705eb70303b04ac5c)
Signed-off-by: Michael Adam <obnox@samba.org>
Reviewed-By: Amitay Isaacs <amitay@gmail.com>
(This used to be ctdb commit 61264debba58355b9716ac1637fdedef5ed249c8)
Describe the (new) process more precisely.
And mention that is the last step of the vacuuming process
that is performed on the lmaster.
Signed-off-by: Michael Adam <obnox@samba.org>
Reviewed-By: Amitay Isaacs <amitay@gmail.com>
(This used to be ctdb commit 06de786c786f1cab4c6721adf47c2cb1e8a72adb)
More precisely, before locally deleting an empty record, that has been
migrated with data and that we are dmaster and laster for, we now perform
the deletion on the other nodes in two steps instead of a single step.
- First send out the list of records to be deleted to all
other nodes with the new RECEIVE_RECORDS control to store
the lmaster's current empty copy.
- Then send those records that could be deleted on all nodes
to all nodes again with the TRY_DELETE_RECORDS control
as before for deletion.
- Finally delete those records locally that were successfully
deleted remotely in the previous step.
This fixes an old race where a recovery that hits the vacuum process
square between the eyes can create gaps in the record's history and
hence let the records resurrect. In the case of the locking.tdb,
that could mean that a file that was already closed, was recorded as
being open and locked again, so samba clients were locked out of that
file until samba was restarted.
Signed-off-by: Michael Adam <obnox@samba.org>
Reviewed-By: Amitay Isaacs <amitay@gmail.com>
(This used to be ctdb commit eee23d44b6427be8ab49bbfcee3abb62f37dfcc7)
Now that the nodemap and its talloc children don't hang off of the
delete_records_list talloc context, we can build the nodemap
and earlier, and move the construction of the delete_records_list
to where it is more obvious what it is used for.
Signed-off-by: Michael Adam <obnox@samba.org>
Reviewed-By: Amitay Isaacs <amitay@gmail.com>
(This used to be ctdb commit e3740899c1af6962f93c85ad7d1cb71bddce45c6)
This removes the implicit artificial talloc hierarchy and makes the
code easier to understand.
Signed-off-by: Michael Adam <obnox@samba.org>
Reviewed-By: Amitay Isaacs <amitay@gmail.com>
(This used to be ctdb commit b7c3b8cdf92c597e621e3dae28b110d321de5ea8)
Signed-off-by: Michael Adam <obnox@samba.org>
Reviewed-By: Amitay Isaacs <amitay@gmail.com>
(This used to be ctdb commit 59a887e12469266e514ad7d4e34810e7ea888ba3)
Add a common exit point for cleanup.
Signed-off-by: Michael Adam <obnox@samba.org>
Reviewed-By: Amitay Isaacs <amitay@gmail.com>
(This used to be ctdb commit 11d728465a9c635e1829abaae17e2f7720433b69)
Signed-off-by: Michael Adam <obnox@samba.org>
Reviewed-By: Amitay Isaacs <amitay@gmail.com>
(This used to be ctdb commit 3710dd0f313f551f1b302b4961e0203243e3d661)
Signed-off-by: Michael Adam <obnox@samba.org>
Reviewed-By: Amitay Isaacs <amitay@gmail.com>
(This used to be ctdb commit 4640979b526b6dac69a6a0555bfce75fe0206dac)
Signed-off-by: Michael Adam <obnox@samba.org>
Reviewed-By: Amitay Isaacs <amitay@gmail.com>
(This used to be ctdb commit f3e6e7f8ef22bd70dd2f101d818e2e5ab5ed3cd8)
Signed-off-by: Michael Adam <obnox@samba.org>
Reviewed-By: Amitay Isaacs <amitay@gmail.com>
(This used to be ctdb commit 817c77a3d0a3546bf46389cec5f6b54778dd1693)
Signed-off-by: Michael Adam <obnox@samba.org>
Reviewed-By: Amitay Isaacs <amitay@gmail.com>
(This used to be ctdb commit 3f7e35ff0db740cdcb6d27c43a59bb6ca6066efb)
In a heavily loaded and volatile database a lot of SCHEDULE_FOR_DELETION
requests can come in between fast vacuuming runs. This can lead to
significant ctdb cpu load due to the cost of doing talloc_free. This
reduces the number of objects a bit by coalescing the two objects
of delete_record_data into one. It will also avoid having to allocate
another talloc header for a SCHEDULE_FOR_DELETION key. Not the full fix
for this problem, but it might contribute a bit.
(This used to be ctdb commit 9a02f61547ddf74629aca21639d8fb61c1df7cbb)
Pair-Programmed-With: Volker Lendecke <vl@samba.org>
Signed-off-by: Michael Adam <obnox@samba.org>
(This used to be ctdb commit bab744e3c49efef2e05dc09e8ea9bd3e3fa58716)
Wrap all creation of child processes inside ctdb_fork() which is used to track all processes we have spawned.
Capture SIGCHLD to track also which child processes have terminated.
Wrap kill() inside ctdb_kill() and make sure that we never send a !0 signal to a child process pid that has already terminated (and might have been replaced with a
(This used to be ctdb commit f73a4b1495830bcdd094a93732a89dd53b3c2f78)
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)
This way, especially records added in the fast vacuuming runs
are deleted direclty instead of being handed back to the
repack run which will probably not hit because of the vacuum limit.
(This used to be ctdb commit ea3e640a28178ddcb85285f4efec62ccba2483d9)
Track the number of records failed to delete remotely with the
TRY_DELETE_RECORDS control.
And add a number of records left to delete locally.
(This used to be ctdb commit 536aad024d52f2c32dd397fc86294c963b91341b)
