MySQL Server Instance Configuration File

paolino

bisogna editare il file di configurazione my.cnf

devi assicurarti che skip-networking sia commentato e che bind-address = ip-del-server-mysql

a questo punto puoi connetterti a mysql da remoto

ovviamente quando vai a creare le tabelle devi garantire accesso all'utente dal PC locale

per esempio se MySQL si trova all'indirizzo 192.168.0.4 e il PC da cui ti connetti è 192.168.0.18 dovrai creare le tabelle con questi permessi

GRANT ALL ON nome-tabella.* TO nome-utente@'192.168.0.18' IDENTIFIED BY 'qui va la password';

a.marco92

Io trovo solo il file my.ini ma my.cnf nn lo vedo,
le tabelle poi le edita phpBB no io, la versione MySQL invece è: MySQL 5.0

paolino

@a.marco92 said:

Io trovo solo il file my.ini ma my.cnf nn lo vedo,
le tabelle poi le edita phpBB no io, la versione MySQL invece è: MySQL 5.0

si sotto windows è my.ini

a.marco92

Si ma queste stringhe che dici nn le trovo

paolino

beh devono esserci, posta il file my.ini

a.marco92

Ecco il file my.ini

MySQL Server Instance Configuration File

----------------------------------------------------------------------

Generated by the MySQL Server Instance Configuration Wizard

Installation Instructions

----------------------------------------------------------------------

On Linux you can copy this file to /etc/my.cnf to set global options,

mysql-data-dir/my.cnf to set server-specific options

(@localstatedir@ for this installation) or to

~/.my.cnf to set user-specific options.

On Windows you should keep this file in the installation directory

of your server (e.g. C:\Program Files\MySQL\MySQL Server X.Y). To

make sure the server reads the config file use the startup option

"--defaults-file".

To run run the server from the command line, execute this in a

command line shell, e.g.

mysqld --defaults-file="C:\Program Files\MySQL\MySQL Server X.Y\my.ini"

To install the server as a Windows service manually, execute this in a

command line shell, e.g.

mysqld --install MySQLXY --defaults-file="C:\Program Files\MySQL\MySQL Server X.Y\my.ini"

And then execute this in a command line shell to start the server, e.g.

net start MySQLXY

Guildlines for editing this file

----------------------------------------------------------------------

In this file, you can use all long options that the program supports.

If you want to know the options a program supports, start the program

with the "--help" option.

More detailed information about the individual options can also be

found in the manual.

CLIENT SECTION

----------------------------------------------------------------------

The following options will be read by MySQL client applications.

Note that only client applications shipped by MySQL are guaranteed

to read this section. If you want your own MySQL client program to

honor these values, you need to specify it as an option during the

MySQL client library initialization.

[client]
port=3306
[mysql]
default-character-set=latin1

SERVER SECTION

----------------------------------------------------------------------

The following options will be read by the MySQL Server. Make sure that

you have installed the server correctly (see above) so it reads this

file.

[mysqld]

The TCP/IP Port the MySQL Server will listen on

port=3306

#Path to installation directory. All paths are usually resolved relative to this.
basedir="C:/Program Files (x86)/MySQL/MySQL Server 5.0/"
to the database root
datadir="C:/Program Files (x86)/MySQL/MySQL Server 5.0/Data/"

The default character set that will be used when a new schema or table is

created and no character set is defined

default-character-set=latin1

The default storage engine that will be used when create new tables when

default-storage-engine=INNODB

Set the SQL mode to strict

sql-mode="STRICT_TRANS_TABLES,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION"

The maximum amount of concurrent sessions the MySQL server will

allow. One of these connections will be reserved for a user with

SUPER privileges to allow the administrator to login even if the

connection limit has been reached.

max_connections=100

Query cache is used to cache SELECT results and later return them

without actual executing the same query once again. Having the query

cache enabled may result in significant speed improvements, if your

have a lot of identical queries and rarely changing tables. See the

"Qcache_lowmem_prunes" status variable to check if the current value

is high enough for your load.

Note: In case your tables change very often or if your queries are

textually different every time, the query cache may result in a

slowdown instead of a performance improvement.

query_cache_size=0

The number of open tables for all threads. Increasing this value

increases the number of file descriptors that mysqld requires.

Therefore you have to make sure to set the amount of open files

allowed to at least 4096 in the variable "open-files-limit" in

section [mysqld_safe]

table_cache=256

Maximum size for internal (in-memory) temporary tables. If a table

grows larger than this value, it is automatically converted to disk

based table This limitation is for a single table. There can be many

of them.

tmp_table_size=18M

How many threads we should keep in a cache for reuse. When a client

disconnects, the client's threads are put in the cache if there aren't

more than thread_cache_size threads from before. This greatly reduces

the amount of thread creations needed if you have a lot of new

connections. (Normally this doesn't give a notable performance

improvement if you have a good thread implementation.)

thread_cache_size=8
#*** MyISAM Specific options

The maximum size of the temporary file MySQL is allowed to use while

recreating the index (during REPAIR, ALTER TABLE or LOAD DATA INFILE.

If the file-size would be bigger than this, the index will be created

through the key cache (which is slower).

myisam_max_sort_file_size=100G

If the temporary file used for fast index creation would be bigger

than using the key cache by the amount specified here, then prefer the

key cache method. This is mainly used to force long character keys in

large tables to use the slower key cache method to create the index.

myisam_max_extra_sort_file_size=100G

If the temporary file used for fast index creation would be bigger

than using the key cache by the amount specified here, then prefer the

key cache method. This is mainly used to force long character keys in

large tables to use the slower key cache method to create the index.

myisam_sort_buffer_size=35M

Size of the Key Buffer, used to cache index blocks for MyISAM tables.

Do not set it larger than 30% of your available memory, as some memory

is also required by the OS to cache rows. Even if you're not using

MyISAM tables, you should still set it to 8-64M as it will also be

used for internal temporary disk tables.

key_buffer_size=25M

Size of the buffer used for doing full table scans of MyISAM tables.

Allocated per thread, if a full scan is needed.

read_buffer_size=64K
read_rnd_buffer_size=256K

This buffer is allocated when MySQL needs to rebuild the index in

REPAIR, OPTIMZE, ALTER table statements as well as in LOAD DATA INFILE

into an empty table. It is allocated per thread so be careful with

large settings.

sort_buffer_size=256K

#*** INNODB Specific options ***

Use this option if you have a MySQL server with InnoDB support enabled

but you do not plan to use it. This will save memory and disk space

and speed up some things.

#skip-innodb

Additional memory pool that is used by InnoDB to store metadata

information. If InnoDB requires more memory for this purpose it will

start to allocate it from the OS. As this is fast enough on most

recent operating systems, you normally do not need to change this

value. SHOW INNODB STATUS will display the current amount used.

innodb_additional_mem_pool_size=2M

If set to 1, InnoDB will flush (fsync) the transaction logs to the

disk at each commit, which offers full ACID behavior. If you are

willing to compromise this safety, and you are running small

transactions, you may set this to 0 or 2 to reduce disk I/O to the

logs. Value 0 means that the log is only written to the log file and

the log file flushed to disk approximately once per second. Value 2

means the log is written to the log file at each commit, but the log

file is only flushed to disk approximately once per second.

innodb_flush_log_at_trx_commit=1

The size of the buffer InnoDB uses for buffering log data. As soon as

it is full, InnoDB will have to flush it to disk. As it is flushed

once per second anyway, it does not make sense to have it very large

(even with long transactions).

innodb_log_buffer_size=1M

InnoDB, unlike MyISAM, uses a buffer pool to cache both indexes and

row data. The bigger you set this the less disk I/O is needed to

access data in tables. On a dedicated database server you may set this

parameter up to 80% of the machine physical memory size. Do not set it

too large, though, because competition of the physical memory may

cause paging in the operating system. Note that on 32bit systems you

might be limited to 2-3.5G of user level memory per process, so do not

set it too high.

innodb_buffer_pool_size=47M

Size of each log file in a log group. You should set the combined size

of log files to about 25%-100% of your buffer pool size to avoid

unneeded buffer pool flush activity on log file overwrite. However,

note that a larger logfile size will increase the time needed for the

recovery process.

innodb_log_file_size=24M

Number of threads allowed inside the InnoDB kernel. The optimal value

depends highly on the application, hardware as well as the OS

scheduler properties. A too high value may lead to thread thrashing.

innodb_thread_concurrency=10

paolino

la sezione che interessa è questa


[mysqld]
# The TCP/IP Port the MySQL Server will listen on
port=3306

è qui sotto che va aggiunto bind-address=192.168.xx.xx

a.marco92

Ma l'indirizzo IP che devo inserire di chi deve essere?

Non solo ma va inserita cosi?

[mysqld]

The TCP/IP Port the MySQL Server will listen on

port=3306
bind-address=192.168.xx.xx

paolino

@a.marco92 said:

Ma l'indirizzo IP che devo inserire di chi deve essere?

Non solo ma va inserita cosi?

[mysqld]

The TCP/IP Port the MySQL Server will listen on

port=3306
bind-address=192.168.xx.xx

è l'IP del computer su cui MySQL è in esecuzione

a.marco92

Ho provato ma dà quest'errore phpBB:

Impossibile collegarsi al database, controlla il messaggio d’errore qui sotto.
Access denied for user 'webnet32'@'ns30.altervista.org' (using password: YES)

Ecco dove sta installato phpBB: webnet32.altervista.org
Ecco invece dove sta installato MySQL: webnet32.dyndns.org

paolino

@a.marco92 said:

Ho provato ma dà quest'errore phpBB:

Impossibile collegarsi al database, controlla il messaggio d?errore qui sotto.
Access denied for user 'webnet32'@'ns30.altervista.org' (using password: YES)

Ecco dove sta installato phpBB: webnet32.altervista.org
Ecco invece dove sta installato MySQL: webnet32.dyndns.org

significa che l'utente non ha i permessi per accedere al database

devi creare l'utente webnet32 e dargli tutti i permessi necessari

lo puoi fare sia da shell che tramite phpmyadmin