This feature was proposed by @rosmo in PR #2643 and later redesigned
in order to fit better with the other options for non-interactive modes
of redis-cli. The idea is basically to allow to collect latency
information in scripts, cron jobs or whateever, just running for a
limited time and then producing a single output.
In issues #3361 / #3365 a problem was reported / fixed with redis-cli
not updating correctly the current DB on error after SELECT.
In theory this bug was fixed in 0042fb0e, but actually the commit only
fixed the prompt updating, not the fact the state was set in a wrong
way.
This commit removes the check in the prompt update, now that hopefully
it is the state that is correct, there is no longer need for this check.
I recently introduced populating the autocomplete help array with the
COMMAND command if available. However this was performed before parsing
the arguments, defaulting to instance 6379. After the connection is
performed it remains stable.
The effect is that if there is an instance running on port 6339,
whatever port you specify is ignored and 6379 is connected to instead.
The right port will be selected only after a reconnection.
Close#3314.
Use the COMMAND output to fill with partial information the built-in
help. This makes redis-cli able to at least complete commands that are
exported by the Redis server it is connected to, but were not available
in the help.h file when the redis-cli binary was compiled.
Previously it was possible to activate a debugging session only using
the --ldb option in redis-cli. Now calling SCRIPT DEBUG can also
activate the debugging mode without putting the redis-cli in a
desynchronized state.
Related to #2952.
There are some cases of printing unsigned integer with %d conversion
specificator and vice versa (signed integer with %u specificator).
Patch by Sergey Polovko. Backported to Redis from Disque.
Redis-cli handles the debugger "eval" command in a special way since
sdssplitargs() would not be ok: we need to send the Redis debugger the
whole Lua script without any parsing. However in order to later free the
argument vector inside redis-cli using just sdsfreesplitres(), we need
to allocate the array of SDS pointers using the same allocator SDS is
using, that may differ to what Redis is using.
So now a newer version of SDS exports sds_malloc() and other allocator
functions to give access, to the program it is linked to, the allocator
used internally by SDS.
When the debugger exits now it produces an <endsession> tag that informs
redis-cli (or other debugging clients) that the session terminated.
This way the client knows there is yet another reply to read (the one of
the EVAL script itself), and can switch to non-debugging mode ASAP.
The code was broken and resulted in redis-cli --pipe to, most of the
times, writing everything received in the standard input to the Redis
connection socket without ever reading back the replies, until all the
content to write was written.
This means that Redis had to accumulate all the output in the output
buffers of the client, consuming a lot of memory.
Fixed thanks to the original report of anomalies in the behavior
provided by Twitter user @fsaintjacques.
The command reports information about the hash table internal state
representing the specified database ID.
This can be used in order to investigate rehashings, memory usage issues
and for other debugging purposes.
Less grays: more readable palette since usually we have a non linear
distribution of percentages and very near gray tones are hard to take
apart. Final part of the palette is gradient from yellow to red. The red
part is hardly reached because of usual distribution of latencies, but
shows up mainly when latencies are very high because of the logarithmic
scale, this is coherent to what people expect: red = bad.
--stat mode already used to reconnect automatically if the server is no
longer available. This is useful since this is an interactive mode used
for debugging, however the same applies to --latency and --latency-dist
modes, so now both use the reconnecting command execution as well.
The reconnection code was modified to use basic VT100 escape sequences
in order to play better with different kinds of output on the screen
when the reconnection happens, and to hide the reconnection attempt
output when finally the reconnection happens.
So far not able to find a color palette within the 256 colors which is
not confusing. However I believe it is a possible task, so will try
better later.
if redis works in cluster-mode and redis-cli was run with argv, reconnect if needs.
example:
./redis-cli set foo bar
if return is MOVED redis-cli just do nothing.
Modified by @antirez since the original fix to genInfoString() looked
weak. Probably the clang analyzer complained about `section` being
possibly NULL, and strcasecmp() called with a NULL pointer. In the
practice this can never happen, still for the sake of correctness
the right fix is not to modify only the first call, but to set `section`
to the value of "default" if it happens to be NULL.
Closes#1660
Previously redis-cli would happily show "-1" or "99999"
as valid DB choices.
Now, if the SELECT call returned an error, we don't update
the DB number in the CLI.
Inspired by @anupshendkar in #1313Fixes#566, #1313
Previously, if you did SELECT then AUTH, redis-cli
would show your SELECT'd db even though it didn't
happen.
Note: running into this situation is a (hopefully) very limited
used case of people using multiple DBs and AUTH all at the same
time.
Fixes antirez#1639
This commit reworks the redis-cli --bigkeys command to provide more
information about our progress as well as output summary information
when we're done.
- We now show an approximate percentage completion as we go
- Hiredis pipelining is used for TYPE and SIZE retreival
- A summary of keyspace distribution and overall breakout at the end
This commit changes the findBigKeys() function in redis-cli.c to use the new
SCAN command for iterating the keyspace, rather than RANDOMKEY. Because we
can know when we're done using SCAN, it will exit after exhausting the keyspace.
The computation is just something to take the CPU busy, no need to use a
specific type. Since stdint.h was not included this prevented
compilation on certain systems.
If someone asks for SYNC or PSYNC from redis-cli,
automatically enter slaveMode (as if they ran
redis-cli --slave) and continue printing the replication
stream until either they Ctrl-C or the master gets disconnected.
The code freed a reply object that was never created, resulting in a
segfault every time randomkey returned a key that was deleted before we
queried it for size.
When in --pipe mode, after all the data transfer to the server is
complete, now redis-cli waits at max the specified amount of
seconds (30 by default, use 0 to wait forever) without receiving any
reply at all from the server. After this time limit the operation is
aborted with an error.
That's related to issue #681.
If the protocol read from stdin happened to contain grabage (invalid
random chars), in the previous implementation it was possible to end
with something like:
dksfjdksjflskfjl*2\r\n$4\r\nECHO....
That is invalid as the *2 should start into a new line. Now we prefix
the ECHO with a CRLF that has no effects on the server but prevents this
issues most of the times.
Of course if the offending wrong sequence is something like:
$3248772349\r\n
No one is going to save us as Redis will wait for data in the context of
a big argument, so this fix does not cover all the cases.
This partially fixes issue #681.
Previously redis-cli never tried to raise an error when an unrecognized
switch was encountered, as everything after the initial options is to be
transmitted to the server.
However this is too liberal, as there are no commands starting with "-".
So the new behavior is to produce an error if there is an unrecognized
switch starting with "-". This should not break past redis-cli usages
but should prevent broken options to be silently discarded.
As far the first token not starting with "-" is encountered, all the
rest is considered to be part of the command, so you cna still use
strings starting with "-" as values, like in:
redis-cli --port 6380 set foo --my-value
Redis-tools is a connection of tools no longer mantained that was
intented as a way to economically make sense of Redis in the pre-vmware
sponsorship era. However there was a nice redis-stat utility, this
commit imports one of the functionalities of this tool here in redis-cli
as it seems to be pretty useful.
Usage: redis-cli --stat
The output is similar to vmstat in the format, but with Redis specific
stuff of course.
From the point of view of the monitored instance, only INFO is used in
order to grab data.
This should improve things in two ways:
1) Prevent timeouts caused by the execution of long commands.
2) Improve detection of real connection errors.
This is mostly effective only on Linux because of the bogus default
keepalive settings. In Linux we have OS-specific calls to set the
keepalive interval to reasonable values.
Redis pings slaves in "pre-synchronization stage" with newlines. (See
https://github.com/antirez/redis/blob/2.6.9/src/replication.c#L814)
However, redis-cli does not expect this - it sees the newline as the end
of the bulk length line, and ends up returning 0 as bulk the length.
This manifests as the following when running redis-cli:
$ ./src/redis-cli --rdb some_file
SYNC sent to master, writing 0 bytes to 'some_file'
Transfer finished with success.
With this commit, we just ignore leading newlines while reading the bulk
length line.
To reproduce the problem, load enough data into Redis so that the
preparation of the RDB snapshot takes long enough for a ping to occur
while redis-cli is waiting for the data.
Right there is a mix of help entries ending with periods or
without periods. This standardizes the end of command as without
periods, which seems to be the general custom in most unix tools,
at least.
redis-cli.c uses the time() function to seed the PRNG, but time.h was
not included. This was not noticed since sys/time.h is included and was
enough in most systems (but not correct). With Ubuntu 12.04 GCC
generates a warning that made us aware of the issue.
updated via commands.json in redis-doc repo. Currently
use `make src/help.h` to re-generate. The following
are valid from the REPL:
help
help [command]
help [group]
help groups
ex:
help sort
help hash
networking related stuff moved into networking.c
moved more code
more work on layout of source code
SDS instantaneuos memory saving. By Pieter and Salvatore at VMware ;)
cleanly compiling again after the first split, now splitting it in more C files
moving more things around... work in progress
split replication code
splitting more
Sets split
Hash split
replication split
even more splitting
more splitting
minor change
