streaming generates lots of small sstables with large token range,
which triggers O(N^2) in space in interval map.
level 0 sstables will now be stored in a structure that has O(N)
in space complexity and which will be included for every read.
Fixes#2287.
Signed-off-by: Raphael S. Carvalho <raphaelsc@scylladb.com>
Message-Id: <20170417185509.6633-1-raphaelsc@scylladb.com>
(cherry picked from commit 11b74050a1)
We take a reference of endpoint_state entry in endpoint_state_map. We
access it again after code which defers, the reference can be invalid
after the defer if someone deletes the entry during the defer.
Fix this by checking take the reference again after the defering code.
I also audited the code to remove unsafe reference to endpoint_state_map entry
as much as possible.
Fixes the following SIGSEGV:
Core was generated by `/usr/bin/scylla --log-to-syslog 1 --log-to-stdout
0 --default-log-level info --'.
Program terminated with signal SIGSEGV, Segmentation fault.
(this=<optimized out>) at /usr/include/c++/5/bits/stl_pair.h:127
127 in /usr/include/c++/5/bits/stl_pair.h
[Current thread is 1 (Thread 0x7f1448f39bc0 (LWP 107308))]
Fixes#2271
Message-Id: <529ec8ede6da884e844bc81d408b93044610afd2.1491960061.git.asias@scylladb.com>
(cherry picked from commit d27b47595b)
The previous fix removed the additional insertion of "min rp" per source
shard based on whether we had processed existing CF:s or not (i.e. if
a CF does not exist as sstable at all, we must tag it as zero-rp, and
make whole shard for it start at same zero.
This is bad in itself, because it can cause data loss. It does not cause
crashing however. But it did uncover another, old old lingering bug,
namely the commitlog reader initiating its stream wrongly when reading
from an actual offset (i.e. not processing the whole file).
We opened the file stream from the file offset, then tried
to read the file header and magic number from there -> boom, error.
Also, rp-to-file mapping was potentially suboptimal due to using
bucket iterator instead of actual range.
I.e. three fixes:
* Reinstate min position guarding for unencoutered CF:s
* Fix stream creating in CL reader
* Fix segment map iterator use.
v2:
* Fix typo
Message-Id: <1490611637-12220-1-git-send-email-calle@scylladb.com>
(cherry picked from commit b12b65db92)
Fixes#2173
Per-shard min positions can be unset if we never collected any
sstable/truncation info for it, yet replay segments of that id.
Wrap the lookups to handle "missing data -> default", which should have been
there in the first place.
Message-Id: <1490185101-12482-1-git-send-email-calle@scylladb.com>
(cherry picked from commit c3a510a08d)
This patch exposes Scylla's Prometheus port by default. You can now use
the Scylla Monitoring project with the Docker image:
https://github.com/scylladb/scylla-grafana-monitoring
To configure the IP addresses, use the 'docker inspect' command to
determine Scylla's IP address (assuming your running container is called
'some-scylla'):
docker inspect --format='{{ .NetworkSettings.IPAddress }}' some-scylla
and then use that IP address in the prometheus/scylla_servers.yml
configuration file.
Fixes#1827
Message-Id: <1490008357-19627-1-git-send-email-penberg@scylladb.com>
(cherry picked from commit 85a127bc78)
Fixes#2098
Replay previously did all segments in parallel on shard 0, which
caused heavy memory load. To reduce this and spread footprint
across shards, instead do X segments per shard, sequential per shard.
v2:
* Fixed whitespace errors
Message-Id: <1489503382-830-1-git-send-email-calle@scylladb.com>
(cherry picked from commit 078589c508)
On Ubuntu 14.04, the lsblk doesn't have '-p' option, but
`scylla_setup` try to get block list by `lsblk -pnr` and
trigger error.
Current simple pattern will match all help content, it might
match wrong options.
scylla-test@amos-ubuntu-1404:~$ lsblk --help | grep -e -p
-m, --perms output info about permissions
-P, --pairs use key="value" output format
Let's use strict pattern to only match option at the head. Example:
scylla-test@amos-ubuntu-1404:~$ lsblk --help | grep -e '^\s*-D'
-D, --discard print discard capabilities
Signed-off-by: Amos Kong <amos@scylladb.com>
Message-Id: <4f0f318353a43664e27da8a66855f5831457f061.1489712867.git.amos@scylladb.com>
(cherry picked from commit 468df7dd5f)
Metrics should have their unique name. This patch changes
throttled_writes of the queu lenght to current_throttled_writes.
Without it, metrics will be reported twice under the same name, which
may cause errors in the prometheus server.
This could be related to scylladb/seastar#250
Fixes#2163.
Signed-off-by: Amnon Heiman <amnon@scylladb.com>
Message-Id: <20170314081456.6392-1-amnon@scylladb.com>
(cherry picked from commit 295a981c61)
We have:
auto halves = range.split(midpoint, dht::token_comparator());
We saw a case where midpoint == range.start, as a result, range.split
will assert becasue the range.start is marked non-inclusive, so the
midpoint doesn't appear to be contain()ed in the range - hence the
assertion failure.
Fixes#2148
Signed-off-by: Nadav Har'El <nyh@scylladb.com>
Signed-off-by: Asias He <asias@scylladb.com>
Message-Id: <93af2697637c28fbca261ddfb8375a790824df65.1489023933.git.asias@scylladb.com>
(cherry picked from commit 39d2e59e7e)
"If a node is bootstrapped with auto_boostrap disabled, it will not
wait for schema sync before creating global keyspaces for auth and
tracing. When such schema changes are then reconciled with schema on
other nodes, they may overwrite changes made by the user before the
node was started, because they will have higher timestamp.
To prevent that, let's use minimum timestamp so that default schema
always looses with manual modifications. This is what Cassandra does.
Fixes #2129."
* tag 'tgrabiec/prevent-keyspace-metadata-loss-v1' of github.com:scylladb/seastar-dev:
db: Create default auth and tracing keyspaces using lowest timestamp
migration_manager: Append actual keyspace mutations with schema notifications
(cherry picked from commit 6db6d25f66)
The skip() implementation for the compressed file input stream incorrectly
handled the case of skipping to the end of file: In that case we just need
to update the file pointer, but not skip anywhere in the compressed disk
file; In particular, we must NOT call locate() to find the relevant on-disk
compressed chunk, because there is none - locate() can only be called on
actual positions of bytes, not on the one-past-end-of-file position.
Fixes#2143
Signed-off-by: Nadav Har'El <nyh@scylladb.com>
Message-Id: <20170308100057.23316-1-nyh@scylladb.com>
(cherry picked from commit 506e074ba4)
logalloc::reclaim_lock prevents reclaim from running which may cause
regular allocation to fail although there is enough of free memory.
To solve that there is an allocation_section which acquire reclaim_lock
and if allocation fails it run reclaimer outside of a lock and retries
the allocation. The patch make use of allocation_section instead of
direct use of reclaim_lock in memtable code.
Fixes#2138.
Message-Id: <20170306160050.GC5902@scylladb.com>
(cherry picked from commit d7bdf16a16)
Since gcc-5/stretch=5.4.1-2 removed from apt repository, we nolonger able to
build gcc-5.
To avoid dead link, use launchpad.net archives instead of using apt-get source.
Signed-off-by: Takuya ASADA <syuu@scylladb.com>
Message-Id: <1488189378-5607-1-git-send-email-syuu@scylladb.com>
(cherry picked from commit ba323e2074)
If query_time is time_point::min(), which is used by
to_data_query_result(), the result of subtraction of
gc_grace_seconds() from query_time will overflow.
I don't think this bug would currently have user-perceivable
effects. This affects which tombstones are dropped, but in case of
to_data_query_result() uses, tombstones are not present in the final
data query result, and mutation_partition::do_compact() takes
tombstones into consideration while compacting before expiring them.
Fixes the following UBSAN report:
/usr/include/c++/5.3.1/chrono:399:55: runtime error: signed integer overflow: -2147483648 - 604800 cannot be represented in type 'int'
Message-Id: <1488385429-14276-1-git-send-email-tgrabiec@scylladb.com>
(cherry picked from commit 4b6e77e97e)
Fixes the following UBSAN warning:
core/semaphore.hh:293:74: runtime error: reference binding to misaligned address 0x0000006c55d7 for type 'struct basic_semaphore', which requires 8 byte alignment
Since the field was not initialied properly, probably also fixes some
user-visible bug.
Message-Id: <1488368222-32009-1-git-send-email-tgrabiec@scylladb.com>
(cherry picked from commit 0c84f00b16)
Failing to close a file properly before destroying file's object causes
crashes.
[tgrabiec: fixed typo]
Message-Id: <20170221144858.GG11471@scylladb.com>
(cherry picked from commit 0977f4fdf8)
ninja-build-1.6.0-2.fc23.src.rpm on fedora web site deleted for some
reason, but there is ninja-build-1.7.2-2 on EPEL, so we don't need to
backport from Fedora anymore.
Fixes#2087
Signed-off-by: Takuya ASADA <syuu@scylladb.com>
Message-Id: <1487155729-13257-1-git-send-email-syuu@scylladb.com>
(cherry picked from commit 9c8515eeed)
"Before, the logic for releasing writes blocked on dirty worked like this:
1) When region group size changes and it is not under pressure and there
are some requests blocked, then schedule request releasing task
2) request releasing task, if no pressure, runs one request and if there are
still blocked requests, schedules next request releasing task
If requests don't change the size of the region group, then either some request
executes or there is a request releasing task scheduled. The amount of scheduled
tasks is at most 1, there is a single releasing thread.
However, if requests themselves would change the size of the group, then each
such change would schedule yet another request releasing thread, growing the task
queue size by one.
The group size can also change when memory is reclaimed from the groups (e.g.
when contains sparse segments). Compaction may start many request releasing
threads due to group size updates.
Such behavior is detrimental for performance and stability if there are a lot
of blocked requests. This can happen on 1.5 even with modest concurrency
because timed out requests stay in the queue. This is less likely on 1.6 where
they are dropped from the queue.
The releasing of tasks may start to dominate over other processes in the
system. When the amount of scheduled tasks reaches 1000, polling stops and
server becomes unresponsive until all of the released requests are done, which
is either when they start to block on dirty memory again or run out of blocked
requests. It may take a while to reach pressure condition after memtable flush
if it brings virtual dirty much below the threshold, which is currently the
case for workloads with overwrites producing sparse regions.
I saw this happening in a write workload from issue #2021 where the number of
request releasing threads grew into thousands.
Fix by ensuring there is at most one request releasing thread at a time. There
will be one releasing fiber per region group which is woken up when pressure is
lifted. It executes blocked requests until pressure occurs."
* tag 'tgrabiec/lsa-single-threaded-releasing-v2' of github.com:cloudius-systems/seastar-dev:
tests: lsa: Add test for reclaimer starting and stopping
tests: lsa: Add request releasing stress test
lsa: Avoid avalanche releasing of requests
lsa: Move definitions to .cc
lsa: Simplify hard pressure notification management
lsa: Do not start or stop reclaiming on hard pressure
tests: lsa: Adjust to take into account that reclaimers are run synchronously
lsa: Document and annotate reclaimer notification callbacks
tests: lsa: Use with_timeout() in quiesce()
(cherry picked from commit 7a00dd6985)
Since scylla-housekeeping running as scylla user, it doesn't have a permission
to create a file on /etc/scylla.d.
So introduce /var/lib/scylla-housekeeping which owns by scylla user, place uuid
file on the directory.
Fixes#2009
Signed-off-by: Takuya ASADA <syuu@scylladb.com>
Message-Id: <1484235946-12463-1-git-send-email-syuu@scylladb.com>
(cherry picked from commit bee7f549a9)
query_mutations_locally() takes one_or_two_partition_ranges by
reference and requires, indirectly, that it is kept alive until
operation resolves. However, we were passing expiring value to it, the
result of unwrap().
Fixes dtest failure in consistent_bootstrap_test.py:TestBootstrapConsistency.consistent_reads_after_bootstrap_test
Another potential problem was that we were dereferencing "s" in the same
expression which move-constructs an argument out of it.
Message-Id: <1484222759-4967-1-git-send-email-tgrabiec@scylladb.com>
(cherry picked from commit 1e8151b4f2)
Explicitly generate tables' IDs of tables from the system_traces KS using
generate_legacy_id() in order to ensure all Nodes create these tables with
the same IDs.
This is going to prevent hitting issue #420.
Fixes#1976
Signed-off-by: Vlad Zolotarov <vladz@scylladb.com>
Message-Id: <1484153725-31030-1-git-send-email-vladz@scylladb.com>
(cherry picked from commit ca0a0f1458)
It still has problems:
- while resharding a very large leveled compaction strategy table, a huge
amount of tiny sstables are generated, overwhelming the file descriptor
limits
- there is a large impact on read latency while resharding is going on
This patch fixes a regression introduced in 0518895, where we counted
one extra row per partition when it contained live, non static rows.
We also simplify the visitor logic further, since now we don't need to
count rows one by one. Also remove a bunch of unused fields.
Signed-off-by: Duarte Nunes <duarte@scylladb.com>
Message-Id: <1482234083-2447-1-git-send-email-duarte@scylladb.com>
(cherry picked from commit d7e607ff51)
This patch gets housekeeping to create a uuid file if a path to a uuid
file is upplied but the file is missing.
Because it import the uuid lib, uuid parameters where renamed.
Fixes#1987
Signed-off-by: Amnon Heiman <amnon@scylladb.com>
Message-Id: <1483866553-13855-2-git-send-email-amnon@scylladb.com>
(cherry picked from commit 32888fc0aa)
mutation_result_merger::get() assumes that the merged result may be a
short read if at least one of the partial results is a short read (in
other words, if none of the partial results is a short read, then the
merged result is also not a short read). However this is not true;
because we update the memory accounter incrementally, we may stop
scanning early. All the partial results are full; but we did not scan
the entire range.
Fix by changing the short_read variable initialization from `no`
(which assumes we'll encounter a short read indication when processing
one of the batches) to `this->short_read()`, which also takes into
account the memory accounter.
Fixes#2001.
Message-Id: <20170108111315.17877-1-avi@scylladb.com>
(cherry picked from commit 8f36dca6f1)
Before this patch system table writes were not writing to commit log
because database::add_column_family() disables writes to commit log
for the table which is added if _commitlog is not set at that
time. Fix by initializing commit log before system tables are created.
Fixes#1986.
Fixes recent regression in
batch_test.py:TestBatch.replay_after_schema_change_test after
scylla-jmx was updated to not flush system tables on nodetool flush.
Could cause system keyspace writes to be delayed for more than before
under heavy write workload. Refs #1926.
Message-Id: <1483618117-4535-1-git-send-email-tgrabiec@scylladb.com>
(cherry picked from commit cd630fece6)
During a range scan, we try to avoid sorting according to partition range
when we can do so. This is when we scan fewer than smp::count shards --
each shard's range is strictly ordered with respect to the others.
However, we use the wrong key for the sort -- we use the shard number. But
if we started at shard s > 0 and wrapped around to shard 0, then shard 0's
range will be after the range belonging to shard s, but will sort before it.
Fix by storing the iteration order as the sort key. We use that when we
know that shards do not overlap (shards < smp::count) and the index within
the source partition range vector when they do.
Fixes#1998.
Message-Id: <20170105114253.17492-1-avi@scylladb.com>
(cherry picked from commit eb520e7352)
1.6 truncates paged queries early to avoid overrunning server memory
with too-large query results, but in the case of partition range queries,
this terminates too early due to an uninitialized variable holding the
maximum result size. This results in slow performance due to additional
round trips.
Fix by initializing the maximum result size from the result_memory_tracker
running on the coordinating shard.
Fixes#1995.
Message-Id: <20170105103915.10633-1-avi@scylladb.com>
(cherry picked from commit 4667641f5f)
