修改mysql資料存放位置，無法啟動mysql - Linux

各位強者大大好
我在網路上查詢修改存放mysql資料夾，在實際進行佈署後
但不管怎麼試都是出現MySQL無法啟動的提示:The server quit without updating PID
file

無法順利啟動mysql，想請問各位大大，是否我有哪個步驟有遺漏掉的...?

在網路上找了很多文章，大部分的答案都是：
1. 注釋/etc/my.cnf裏的skip-federated注釋掉即#skip-federated；
2. my.cnf文件配置過高，重新定義其中的參數（根據服務器情況定義）；
3. 殺掉mysql_safe和mysqld進程，然後再重啓；

但是我不管怎麼試都還是沒辦法啟動
◢▆▅▄▃-崩╰(〒皿〒)╯潰-▃▄▅▆◣
再拜託各位大大幫忙... 謝謝...



安裝步驟為:
1、使用yum安裝Percona
yum install Percona-Server-shared-56 Percona-Server-client-56
Percona-Server-server-56;

2、在跟目錄/底下建立data目錄並
　　 cd /;
　　 mkdir data;
3、初始化並將/data 進行目錄的權限調整
cd /data;
mysql_install_db --user=mysql --datadir=/data/mysql;
chmod 755 /data/ -R;
chown mysql:mysql /data -R;

4、啟動mysql
/etc/init.d/mysql start


my.cnf檔案內容如下：
================================
[mysqld_safe]
nice = -15

[client]
socket = /data/mysql/mysql.sock
default-character-set = utf8

[mysqld]
## Charset and Collation
character-set-server = utf8
collation-server = utf8_general_ci

## Files
back_log = 300
open-files-limit = 8192
open-files = 1024
port = 3306
socket = /data/mysql/mysql.sock
pid-file = /data/mysql/mysql.pid
skip-external-locking
skip-name-resolve

## Logging
datadir = /data/mysql
relay_log = mysql-relay-bin
relay_log_index = mysql-relay-index
#log = mysql-gen.log
log_error = mysql-error.err
log_warnings
log_bin = mysql-bin
log_slow_queries = mysql-slow.log
#log_queries_not_using_indexes
long_query_time = 10 #default: 10
max_binlog_size = 256M #max size for binlog before rolling
expire_logs_days = 4 #binlog files older than this will be purged

## Per-Thread Buffers * (max_connections) = total per-thread mem usage
thread_stack = 256K #default: 32bit: 192K, 64bit: 256K
sort_buffer_size = 1M #default: 2M, larger may cause perf issues
read_buffer_size = 1M #default: 128K, change in increments of 4K
read_rnd_buffer_size = 1M #default: 256K
join_buffer_size = 1M #default: 128K
binlog_cache_size = 64K #default: 32K, size of buffer to hold TX
queries
## total per-thread buffer memory usage: 8832000K = 8.625GB

## Query Cache
query_cache_size = 32M #global buffer
query_cache_limit = 512K #max query result size to put in cache

## Connections
max_connections = 2000 #multiplier for memory usage via per-thread
buffers
max_connect_errors = 100 #default: 10
concurrent_insert = 2 #default: 1, 2: enable insert for all instances
connect_timeout = 30 #default -5.1.22: 5, +5.1.22: 10
max_allowed_packet = 32M #max size of incoming data to allow

## Default Table Settings
sql_mode = NO_AUTO_CREATE_USER

## Table and TMP settings
max_heap_table_size = 1G #recommend same size as tmp_table_size
bulk_insert_buffer_size = 1G #recommend same size as tmp_table_size
tmp_table_size = 1G #recommend 1G min
#tmpdir = /data/mysql-tmp0:/data/mysql-tmp1
#Recommend using RAMDISK for tmpdir

## Table cache settings
#table_cache = 512 #5.0.x <default: 64>
#table_open_cache = 512 #5.1.x, 5.5.x <default: 64>

## Thread settings
thread_concurrency = 16 #recommend 2x CPU cores
thread_cache_size = 100 #recommend 5% of max_connections

## Replication
#read_only
#skip-slave-start
#slave-skip-errors = <default: none, recommend:1062>
#slave-net-timeout = <default: 3600>
#slave-load-tmpdir = <location of slave tmpdir>
#slave_transaction_retries = <default: 10>
#server-id = <unique value>
#replicate-same-server-id = <default: 0, recommend: 0, !if
log_slave_updates=1>
#auto-increment-increment = <default: none>
#auto-increment-offset = <default: none>
#master-connect-retry = <default: 60>
#log-slave-updates = <default: 0 disable>
#report-host = <master_server_ip>
#report-user = <replication_user>
#report-password = <replication_user_pass>
#report-port = <default: 3306>
#replicate-do-db =
#replicate-ignore-db =
#replicate-do-table =
#relicate-ignore-table =
#replicate-rewrite-db =
#replicate-wild-do-table =
#replicate-wild-ignore-table =

## Replication Semi-Synchronous 5.5.x only, requires dynamic plugin loading
ability
#rpl_semi_sync_master_enabled = 1 #enable = 1, disable = 0
#rpl_semi_sync_master_timeout = 1000 #in milliseconds <default: 10000>,
master only setting

## 5.1.x and 5.5.x replication related setting.
#binlog_format = MIXED

## MyISAM Engine
key_buffer = 1M #global buffer
myisam_sort_buffer_size = 128M #index buffer size for
creating/altering indexes
myisam_max_sort_file_size = 256M #max file size for tmp table when
creating/alering indexes
myisam_repair_threads = 4 #thread quantity when running repairs
myisam_recover = BACKUP #repair mode, recommend BACKUP

## InnoDB Plugin Dependent Settings
#ignore-builtin-innodb

#plugin-load=innodb=ha_innodb_plugin.so;innodb_trx=ha_innodb_plugin.so;innodb_locks=ha_innodb_plugin.so;innodb_cmp=ha_innodb_plugin.so;innodb_cmp_reset=ha_innodb_plugin.so;innodb_cmpmem=ha_innodb_plugin.so;innodb_cmpmem_reset=ha_innodb_plugin.so;innodb_lock_waits=ha_innodb_plugin.so

## InnoDB IO Capacity - 5.1.x plugin, 5.5.x
#innodb_io_capacity = 200

## InnoDB IO settings - 5.1.x only
#innodb_file_io_threads = 16

## InnoDB IO settings - 5.5.x and greater
#innodb_write_io_threads = 16
#innodb_read_io_threads = 16

## InnoDB Plugin Independent Settings
innodb_data_home_dir = /data/mysql
innodb_data_file_path = ibdata1:128M;ibdata2:10M:autoextend
innodb_log_file_size = 512M #64G_RAM+ = 768, 24G_RAM+ = 512, 8G_RAM+ =
256, 2G_RAM+ = 128
innodb_log_files_in_group = 4 #combined size of all logs <4GB. <2G_RAM
= 2, >2G_RAM = 4
innodb_buffer_pool_size = 18G #global buffer
innodb_additional_mem_pool_size = 4M #global buffer
innodb_status_file #extra reporting
innodb_file_per_table #enable always
innodb_flush_log_at_trx_commit = 2 #2/0 = perf, 1 = ACID
innodb_table_locks = 0 #preserve table locks
innodb_log_buffer_size = 128M #global buffer
innodb_lock_wait_timeout = 60
innodb_thread_concurrency = 16 #recommend 2x core quantity
innodb_commit_concurrency = 16 #recommend 4x num disks
#innodb_flush_method = O_DIRECT #O_DIRECT = local/DAS, O_DSYNC =
SAN/iSCSI
innodb_support_xa = 0 #recommend 0, disable xa to negate extra
disk flush
skip-innodb-doublewrite

## Binlog sync settings
## XA transactions = 1, otherwise set to 0 for best performance
sync_binlog = 0

## TX Isolation
transaction-isolation = REPEATABLE-READ #REPEATABLE-READ req for ACID,
SERIALIZABLE req XA

## Per-Thread Buffer memory utilization equation:
#(read_buffer_size + read_rnd_buffer_size + sort_buffer_size + thread_stack +
join_buffer_size + binlog_cache_size) * max_connections

## Global Buffer memory utilization equation:
# innodb_buffer_pool_size + innodb_additional_mem_pool_size +
innodb_log_buffer_size + key_buffer_size + query_cache_size

[mysqldump]
quick
quote-names
max_allowed_packet = 128M

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