Negative.
I have ring size set to 8, leveldb split across two sets of drives ("fast" and
"slow", but meaningless on the test Vagrant box...just two separate
directories). I checked all of the ../leveldb/* directories. All LOG files are
identical, and no errors in any of them.
I will try to build another Vagrant machine with the default riak.conf and see
if I can get this to repeat. It is almost as if the KV pairs are not persisting
to disk at all.
From: "Matthew Von-Maszewski" <[email protected]>
To: "Joe Olson" <[email protected]>
Cc: "riak-users" <[email protected]>, "cmancini" <[email protected]>
Sent: Friday, February 26, 2016 10:12:15 AM
Subject: Re: Ok, I am stumped. Losing data or riak stop
Joe,
Are there any error messages in the leveldb LOG and/or LOG.old files? These
files are located within each vnode's directory, likely
/var/lib/riak/data/leveldb/*/LOG* on your machine.
The LOG files are not to be confused with 000xxx.log files. The lower case
*.log files are the recovery files that should contain the keys you are
missing. If they are not loading properly, the LOG files should have clues.
Matthew
On Feb 26, 2016, at 11:04 AM, Christopher Mancini < [email protected] > wrote:
Hey Joe,
I will do my best to help, but I am not the most experienced with Riak
operations. Your best bet to get to a solution as fast as possible is to
include the full users group, which I have added to the recipients of this
message.
1. Are the Riak data directories within Vagrant shared directories between the
host and guest? I have had issues with OS file system caching before when
working with web server files.
2. What version of Ubuntu are you using?
3. How did you install Riak on Ubuntu?
4. Have you tried restoring the original distribution riak.conf file and seen
if the issue persists? This would help you determine if the issue is your
config or something with your environment.
Chris
On Fri, Feb 26, 2016 at 10:55 AM Joe Olson < [email protected] > wrote:
BQ_BEGIN
Chris -
I cannot figure out what is going on. Here is my test case. Configuration file
attached. I am running a single node of Riak on a vagrant box with a level DB
back end. I don't even have to bring the box down, merely stopping and
restarting riak '(riak stop' and 'riak start' or 'risk restart) causes all the
keys to be lost. The riak node is set up on a Vagrant box. But again....I do
not have to bring the machine up or down to get this error.
I've also deleted the ring info in /var/lib/riak/ring, and deleted all the
leveldb files. In this case, the bucket type is just n_val = 1, and the ring
size is the minimum of 8.
Is it possible Riak is not flushing RAM to disk after write? The keys only
reside in RAM?
My test procedure:
====On a remote machine=====
riak01@ubuntu:/etc$ curl -i http://
<ip>:8098/types/n1/buckets/test/keys?keys=true
HTTP/1.1 200 OK
Vary: Accept-Encoding
Server: MochiWeb/1.1 WebMachine/1.10.8 (that head fake, tho)
Date: Fri, 26 Feb 2016 13:14:59 GMT
Content-Type: application/json
Content-Length: 17
{"keys":["test"]}
riak01@ubuntu:/etc$
====On the single Riak node itself====
[vagrant@i- 2016022519 -9bb5c84f riak]$ sudo riak stop
ok
[vagrant@i- 2016022519 -9bb5c84f riak]$ sudo riak start
[vagrant@i- 2016022519 -9bb5c84f riak]$ sudo riak ping
pong
====Back to the remote machine====
riak01@ubuntu:/etc$ curl -i http://
<ip>:8098/types/n1/buckets/test/keys?keys=true
HTTP/1.1 200 OK
Vary: Accept-Encoding
Server: MochiWeb/1.1 WebMachine/1.10.8 (that head fake, tho)
Date: Fri, 26 Feb 2016 13:16:34 GMT
Content-Type: application/json
Content-Length: 11
{"keys":[]}
riak01@ubuntu:/etc$
--
Sincerely,
Christopher Mancini
-----------------------------
employee = {
purpose: solve problems with code,
phone: 7164625591,
email: [email protected] ,
github: http://www.github.com/christophermancini
}
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BQ_END
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