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[Maria-discuss] MariaDB Knowledge base - 500 error
by Karthick Subramanian 21 Oct '16

21 Oct '16

Did anyone facing this 500 error while accessing the Maria DB Knowledge Base. Thank you. Don't know to whom we need to report this, so sending to this mail ID. Sorry if it cause any inconvenient for others. When we click the Support in MariaDb website, getting below error: Database Error: *There seems to be a problem connecting to the database server specified in your configuration file. Please contact your local system administrator for further assistance. *

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[Maria-discuss] wsrep problem with dns names
by l vic 20 Oct '16

20 Oct '16

I am trying to use dns hostnames vs. ip addresses in mariadb container configuration: --wsrep-cluster-address=gcomm://node1.cluster1.mesos,node2.cluster1.mesos.. --wsrep_node_address=node1.cluster1.mesos --wsrep-new-cluster .. but i see galera error: WSREP: Failed to resolve tcp://node1.cluster1.mesos The address "node1.cluster1.mesos" i can ping 64 bytes from node-x (10.10.30.1): icmp_seq=1 ttl=64 time=0.023 ms Would it be possible to configure Galera to use dns names? Thanks, -V

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[Maria-discuss] eviction in information_schema?
by l vic 19 Oct '16

19 Oct '16

How can i detect eviction of node from the cluster from "information_schema" other than decreasing of WSREP_CLUSTER_SIZE? Thanks,

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Re: [Maria-discuss] MariaDB Server 10.3 notes
by Federico Razzoli 17 Oct '16

17 Oct '16

You made a question and also provided the answer. If you really need to run a storage engine optimized for a specific use case on an operating system that is not good for MySQL, use Docker :) Federico -------------------------------------------- Lun 17/10/16, Richard Bensley <richardbensley(a)gmail.com> ha scritto: Oggetto: Re: [Maria-discuss] MariaDB Server 10.3 notes A: "Rich Prohaska" <prohaska7(a)gmail.com> Cc: "Maria Discuss" <maria-discuss(a)lists.launchpad.net> Data: Lunedì 17 ottobre 2016, 17:10 With hyper-v becoming free, the arrival of the Linux subsystem, and docker for windows 10; there isn't much of an excuse to proclaim you are unable to use the Linux binaries. The Redis and Postgres devs are already rejoicing. -----Segue allegato----- _______________________________________________ Mailing list: https://launchpad.net/~maria-discuss Post to : maria-discuss(a)lists.launchpad.net Unsubscribe : https://launchpad.net/~maria-discuss More help : https://help.launchpad.net/ListHelp

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[Maria-discuss] MariaDB 5.5.53 and Connector/J 1.5.4 now available
by Daniel Bartholomew 17 Oct '16

17 Oct '16

The MariaDB project is pleased to announce the immediate availability of MariaDB 5.5.53 and MariaDB Connector/J 1.5.4. Both are Stable (GA) releases. See the Release Notes and Changelogs for details. - - Links - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - MariaDB 5.5.53 Stable (GA) - Release Notes: https://mariadb.com/kb/en/mdb-5553-rn/ - Changelog: https://mariadb.com/kb/en/mdb-5553-cl/ - Downloads: https://downloads.mariadb.org/mariadb/5.5.53 About MariaDB 5.5: - https://mariadb.com/kb/en/what-is-mariadb-55/ APT and YUM Repository Configuration Generator: - https://downloads.mariadb.org/mariadb/repositories/ MariaDB Connector/J 1.5.4 Stable (GA) - Release Notes: https://mariadb.com/kb/en/mcj-154-rn/ - Changelog: https://mariadb.com/kb/en/mcj-154-cl/ - Downloads: https://downloads.mariadb.org/connector-java/1.5.4/ About MariaDB Connector/J: - https://mariadb.com/kb/en/about-mariadb-connector-j/ - - MariaDB Webinars - - - - - - - - - - - - - - - - - - - - - - - - - There are several upcoming MariaDB-focused webinars and many previously held ones available to watch on an on-demand basis at: - https://mariadb.com/news-events/webinars - - MariaDB Books - - - - - - - - - - - - - - - - - - - - - - - - - - There is an ever-growing library of MariaDB books available to help you get the most out of MariaDB. See the MariaDB Books page for details and links: - https://mariadb.com/kb/en/mariadb/books/ - - User Feedback plugin - - - - - - - - - - - - - - - - - - - - - - - MariaDB includes a User Feedback plugin. This plugin is disabled by default. If enabled, it submits basic, completely anonymous MariaDB usage information. This information is used by the developers to track trends in MariaDB usage to better guide development efforts. If you would like to help make MariaDB better, please add "feedback=ON" to your my.cnf or my.ini file! See http://mariadb.com/kb/en/user-feedback-plugin for more information. - - Quality - - - - - - - - - - - - - - - - - - - - - - - - - - - - - The project always strives for quality, but in reality, nothing is perfect. Please take time to report any issues you encounter at: - http://mariadb.org/jira - - Support MariaDB - - - - - - - - - - - - - - - - - - - - - - - - - If you would like to contribute to the MariaDB Foundation, please see the "contributing" and "donations" pages. We also have merchandise available in a cafepress store. All proceeds go to support the MariaDB Foundation. - https://mariadb.com/kb/en/contributing - https://mariadb.org/donate/ We hope you enjoy MariaDB! -- MariaDB Website - http://mariadb.org Twitter - http://twitter.com/mariadb Google+ - http://google.com/+mariadb Facebook - http://fb.com/MariaDB.dbms Knowledge Base - http://mariadb.com/kb

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[Maria-discuss] MariaDB Server 10.3 notes
by Colin Charles 17 Oct '16

17 Oct '16

Hi, Sorry this is a little later than expected (who couldn’t resist walking around Amsterdam on that late beautiful Saturday afternoon?)! This session was led by Rasmus whom while employed by MariaDB Corporation, was also the MariaDB Foundation Board member leading it. This was the last session on the formal schedule before lunch (more was added to it as well later on) I notice he’s also blogged [part 1](https://mariadb.org/thoughts-mariadb-server-10-3-mariadb-developers-meet…, and maybe these notes help for part 2 (or maybe they don’t). Scroll down for what is still coming in MariaDB Server 10.2 of course (post-GA even)! # MariaDB Server 10.3 * MDEV-10177 * MDEV-371 * MDEV-7773 - create aggregate functions in SQL * User defined types (pluggable data type API) * CJK language support - MDEV-10267, MDEV-10268 * SPIDER storage engine - MDEV-7698 * Further MyRocks development (10.2 will have it as experimental; MariaDB Corporation is looking to hire a dedicated engineer to work on MyRocks) * InnoDB: InnoDB native partitioning - so MySQL 8 InnoDB? But Monty says there's next to no changes in InnoDB 8... Instant add column. New InnoDB deadlock detection (8.0). New INFORMATION_SCHEMA table (8.0). Dedicated tablespace for temporary tables (in 5.7 and merged, check). Lock wait policy (contribution) * Pluggable parser - MDEV-10142, PL/SQL parser, Oracle syntax support, INTERSECT, EXCLUDE * Sequences (like PostgreSQL implementation) * more for window functions (user defined window functions, MDEV-10855) * more for CTEs (CTE sharing isn't in now, and MySQL 8 has it, so needs to be done; Writable CTEs) * replace yaSSL with GnuTLS (SChannel in Windows) * "always encrypt" on the client side - Booking says there is no particular interest in this at the moment. * socket authentication * X Protocol/Document store - only if people have time or money will it be done * Peter asks if there is any plans to support other languages like V8? Supporting legacy database like Oracle PL/SQL is nice, but what about JavaScript and stuff? Eric mentions his old work on Perl and Java external language stored procedures. Peter says, if JSON and JavaScript are your lingua franca, PL/SQL isn't so interesting - but there was no interest in this amongst the folk. * No slave left behind patch - MDEV-8112 (Booking wants a bit more than the current patch, some extensions) - maybe in 10.2 * Compressed binary log (from Tencent) * For ALTER TABLE show the corresponding CREATE TABLE statement as a comment in the binary log. This is an annotation. * Counters for unsafe statements in replication (maybe in 10.2) * Extended table map in RBR is missing * Galera 4, encryption of gcache * Fix the XA transaction bug ( MySQL has fixed it already ) - MDEV-7974 * Indexes on expressions (this is part of virtual columns, will it not go into 10.2? Check with Serg) * Flashback DDL MDEV-10571 (flashback DML will come in 10.2). It only works with row based replication. Talk about what to name it. There's already a MySQL time machine on github. Many like the name Rewind (but not Monty). Let's do a poll on the mailing list * Additional GIS functions to stay compatible. Also it would be good to have a standalone GIS library (Georg suggests; wlad isn't too happy with the suggestion). Georg suggests that calculations should use the reference systems (Unflatten the world - MariaDB Server GIS the world looks flat) * Optimizer trace - MDEV-6111 * Query rewriting - MDEV-5561 * Replace libmysqlclient with Connector/C - MDEV-9055 - embedded/replication/ storage engine (connect, spider, federatedX) - work continues from 10.2 * Invisible indexes from MySQL 8 - this is something Eric wants to see * With MyRocks coming, should we drop TokuDB (and maybe even deprecate in 10.2?) - bugs that MariaDB Corporation reports to Percona don't seem to get fixed. Peter says that bugs are fixed for customers... and there is ongoing development to make it better * ORDER BY LIMIT optimizer bugs (MDEV-8306) # Still in MariaDB Server 10.2 * Flashback DML - MDEV-10570 * Time delayed replication - MDEV-7145 * MyRocks (10.2.4 - maturity experimental) * GeoJSON (in 10.2 after beta) and ST_Geohash * sha256_password plugin (after GA) - MDEV-9804 - Serg will do it in a MySQL compatible way * sys schema (after GA) * Server system default values MDEV-7635 * MySQL deprecated `DES_ENCRYPT`, `DES_DECRYPT` - Monty says he knows a high level customer using it, a bank. * Column compression from Tencent? -- Colin Charles, http://bytebot.net/blog/ twitter: @bytebot | skype: colincharles "First they ignore you, then they laugh at you, then they fight you, then you win." -- Mohandas Gandhi

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[Maria-discuss] New MariaDB 10.1.18 Galera setup question
by Alex Evonosky 17 Oct '16

17 Oct '16

Hello team- Quick question- I recently just installed mariaDB 10.1.18 (via apt-get) and all went well, no issues.. Here is my galera.cnf file: cat galera.cnf [mysqld] binlog_format = ROW default_storage_engine = InnoDB innodb_autoinc_lock_mode = 2 innodb_locks_unsafe_for_binlog = 1 wsrep_on = ON wsrep_causal_reads = ON wsrep_cluster_address = gcomm://10.10.10.104,10.10.13.2 wsrep_cluster_name = soho_cluster wsrep_node_address = 10.10.10.104 wsrep_provider = /usr/lib/galera/libgalera_smm.so wsrep_provider_options = "gcache.size=512M" wsrep_slave_threads = 4 # Should be equal to the number of cpu-cores. wsrep_sst_auth = "sstuser:r3pl1c@t3" #wsrep_sst_method = xtrabackup-v2 wsrep_sst_method = rsync I started the server as: galera_new_cluster and see no errors. Syslog reports mariaDB has started. However, I never see any messages with WSREP. the database stat shows: mysql -u root -p -e "show status like 'wsrep%'" Enter password: +--------------------------+----------------------+ | Variable_name | Value | +--------------------------+----------------------+ | wsrep_cluster_conf_id | 18446744073709551615 | | wsrep_cluster_size | 0 | | wsrep_cluster_state_uuid | | | wsrep_cluster_status | Disconnected | | wsrep_connected | OFF | | wsrep_local_bf_aborts | 0 | | wsrep_local_index | 4294967295 | | wsrep_provider_name | | | wsrep_provider_vendor | | | wsrep_provider_version | | | wsrep_ready | OFF | | wsrep_thread_count | 0 | +--------------------------+----------------------+ The wsrep always shows OFF. I have removed and purged any and all mysql, mysql-server etc three times and get the same result. Is there something I am missing? Thank you!

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[Maria-discuss] Best way to scale writes
by Jon Foster 17 Oct '16

17 Oct '16

I have a DB scenario that is very write intensive. Essentially its a large scale hit counter of sorts. Currently we're running on a single 12core server with 6 SSDs in a RAID6 array. But we're looking for a way to scale out write volume by adding more servers, hopefully as conveniently as I might add Apache servers to a website. We see two servers laboring so we add a third to the mix and so on. I'm still looking at the various technologies available to me and was wondering if someone out there had some suggestions on this front. Although Galera Cluster says it scales for write loads too it also says that all servers write the same data and make sure its committed by the time the transaction is completed. So it seems like write performance would never scale because all servers are doing the same write. Maybe I'm missing something. Anyhow some pointers would be appreciated. TIA - Jon -- Sent from my Debian Linux workstation -- http://www.debian.org/intro/about Jon Foster JF Possibilities, Inc. jon(a)jfpossibilities.com 541-410-2760 Making computers work for you!

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[Maria-discuss] Virtual CHECK constraint using Virtual columns
by Peter Laursen 16 Oct '16

16 Oct '16

As described in this Blog http://mablomy.blogspot.dk/2016/04/check-constraint-for-mysql-not-null-on.h…. A very nice hack/trick IMO. However it is not working with MariaDB as VC's cannot be declared NOT NULL. What prevents that? -- Peter -- Webyog

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Re: [Maria-discuss] Virtual CHECK constraint using Virtual columns
by Federico Razzoli 16 Oct '16

16 Oct '16

As Sergei said, MariaDB 10.2 has CHECKs. In old versions, honestly I don't like your solution. Take a look at what locks will be set: https://www.percona.com/blog/2006/12/12/innodb-locking-and-foreign-keys/ You can use trigger instead. When you only want to execute a check like this, triggers are not slow. Just SIGNAL an error is the value of i_must_be_between_7_and_12 is not valid. Federico -------------------------------------------- Dom 16/10/16, Pantelis Theodosiou <ypercube(a)gmail.com> ha scritto: Oggetto: Re: [Maria-discuss] Virtual CHECK constraint using Virtual columns A: "Maria Discuss" <maria-discuss(a)lists.launchpad.net> Data: Domenica 16 ottobre 2016, 16:45 Would this be good to be added in the documentation of VIRTUAL columns? Or as a separate page, as a way to enforce/emulate arbitrary CHECK constraints? It can be slightly simplified (IF is not needed) and the BOOLEAN could be BIT (not sure if that adds any complication): CREATE TABLE truth (t BIT PRIMARY KEY) ; INSERT INTO truth (t) VALUES (TRUE) ; -- and remove all write permissions to the table CREATE TABLE checker ( i float, i_must_be_between_7_and_12 BIT AS (i BETWEEN 7 AND 12) -- whatever CHECK constraint we want here PERSISTENT, CONSTRAINT check_i_must_be_between_7_and_ 12 FOREIGN KEY (i_must_be_between_7_and_12) REFERENCES truth (t) ); On Wed, Apr 6, 2016 at 6:46 PM, Pantelis Theodosiou <ypercube(a)gmail.com> wrote: On Mon, Apr 4, 2016 at 2:10 PM, Peter Laursen <peter_laursen(a)webyog.com> wrote: As described in this Blog http://mablomy.blogspot. dk/2016/04/check-constraint- for-mysql-not-null-on.html. A very nice hack/trick IMO. However it is not working with MariaDB as VC's cannot be declared NOT NULL. What prevents that? (Peter, sorry fro the previous private reply, not sure how I got the reply buttons wrong.) I can't answer that, but there's another workaround for (some) CHECK constraints, described here: http://dba.stackexchange.com/ questions/9662/check- constraint-does-not-work/ 22019#22019 Unfortunately, it works only for smallish (int or date) ranges. We can't use for floats or decimals (as it would require a very big reference table). But it could be combined with the hack you link, using something like: CREATE TABLE truth (t BOOLEAN PRIMARY KEY) ; INSERT INTO truth (t) VALUES (TRUE) ; -- and remove all write permissions to the table CREATE TABLE checker ( i int, i_must_be_between_7_and_12 BOOLEAN AS (IF(i BETWEEN 7 AND 12, TRUE, FALSE)) PERSISTENT, CONSTRAINT check_i_must_be_between_7_and_ 12 FOREIGN KEY (i_must_be_between_7_and_12) REFERENCES truth (t) ); Haven't tested it but should work for more complex constraints as well. Pantelis -----Segue allegato----- _______________________________________________ Mailing list: https://launchpad.net/~maria-discuss Post to : maria-discuss(a)lists.launchpad.net Unsubscribe : https://launchpad.net/~maria-discuss More help : https://help.launchpad.net/ListHelp

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