Хранение тегов

[yunasc]

Вот думаю как хранить теги в базе данных лучше всего, что-б получить быстрый поиск по ним, без использования Sphinx итд.

FULLTEXT - фигня т.к завязка на mySQL
Sphinx - на хостинге не поставишь
LIKE '%tag%' - медленно

Пока-что пришел в такому варианту, но не устраивает план выполнения запроса:

SELECT t.id, t.moderated, t.moderatedby, t.category, t.leechers, t.seeders, t.free,
t.name, t.times_completed, t.size, t.added, t.comments, t.numfiles, t.filename, t.not_sticky,
t.owner, IF(t.numratings < 1, NULL, ROUND(t.ratingsum / t.numratings, 1)) AS rating,
c.name AS cat_name, c.image AS cat_pic, u.username, u.class, EXISTS(
SELECT *
FROM readtorrents
WHERE readtorrents.userid = 1 AND readtorrents.torrentid = t.id) AS readtorrent
FROM torrents AS t
LEFT JOIN categories AS c ON t.category = c.id
LEFT JOIN users AS u ON t.owner = u.id
INNER JOIN tag_index AS ti ON ti.tid = t.id
INNER JOIN tags AS ta ON ta.id = ti.tag
WHERE t.visible = 'yes' AND (ta.name = 'elementary' OR ta.name = '720p')
GROUP BY t.id
ORDER BY t.not_sticky DESC, t.id DESC
LIMIT 0,25

Ну и сами таблицы вот:

CREATE TABLE `tags` (
    `id` INT(10) UNSIGNED NOT NULL AUTO_INCREMENT,
    `name` VARCHAR(50) NOT NULL DEFAULT '',
    `count` SMALLINT(5) UNSIGNED NOT NULL DEFAULT '0',
    PRIMARY KEY (`id`)
) ENGINE=MyISAM;

INSERT INTO `tags` (`id`, `name`, `count`) VALUES (1, 'elementary', 1);
INSERT INTO `tags` (`id`, `name`, `count`) VALUES (2, 'marvel', 1);
INSERT INTO `tags` (`id`, `name`, `count`) VALUES (3, '720p', 2);

CREATE TABLE `tag_index` (
    `tid` INT(10) UNSIGNED NOT NULL DEFAULT '0',
    `tag` INT(10) UNSIGNED NULL DEFAULT '0',
    UNIQUE INDEX `tagged` (`tid`, `tag`)
) ENGINE=MyISAM;

INSERT INTO `tag_index` (`tid`, `tag`) VALUES (1, 1);
INSERT INTO `tag_index` (`tid`, `tag`) VALUES (1, 3);
INSERT INTO `tag_index` (`tid`, `tag`) VALUES (2, 2);
INSERT INTO `tag_index` (`tid`, `tag`) VALUES (2, 3);

INSERT INTO `torrents` (`id`, `info_hash`, `name`, `filename`, `save_as`, `descr`, `ori_descr`, `image1`, `image2`, `image3`, `image4`, `image5`, `category`, `size`, `added`, `type`, `numfiles`, `comments`, `views`, `hits`, `times_completed`, `leechers`, `seeders`, `last_action`, `last_reseed`, `visible`, `banned`, `owner`, `numratings`, `ratingsum`, `free`, `not_sticky`, `moderated`, `moderatedby`, `keywords`, `description`) VALUES (1, 0x32393761383636333965333862386137393764353336306563663836303164386265363130343638, 'Elementary.S02E14.720p.HDTV.X264-DIMENSION.mkv', 'Elementary.S02E14.720p.HDTV.X264-DIMENSION.mkv.torrent', 'Elementary.S02E14.720p.HDTV.X264-DIMENSION.mkv', 'Elementary S02E14 720p DIMENSION', 'Elementary S02E14 720p DIMENSION', '', '', '', '', '', 11, 887499089, '2014-02-24 14:46:48', 'single', 1, 0, 1, 0, 0, 0, 0, '2014-02-24 14:46:48', '0000-00-00 00:00:00', 'yes', 'no', 1, 0, 0, 'silver', 'yes', 'yes', 1, '', '');
INSERT INTO `torrents` (`id`, `info_hash`, `name`, `filename`, `save_as`, `descr`, `ori_descr`, `image1`, `image2`, `image3`, `image4`, `image5`, `category`, `size`, `added`, `type`, `numfiles`, `comments`, `views`, `hits`, `times_completed`, `leechers`, `seeders`, `last_action`, `last_reseed`, `visible`, `banned`, `owner`, `numratings`, `ratingsum`, `free`, `not_sticky`, `moderated`, `moderatedby`, `keywords`, `description`) VALUES (2, 0x61653536626238323165656239643739366566633934336264383063376661666536616531396366, 'Thor.The.Dark.World.2013.720p.WEB-DL.Rus.Eng.HDCLUB.mkv', 'Thor.The.Dark.World.2013.720p.WEB-DL.Rus.Eng.HDCLUB.mkv.torrent', 'Thor.The.Dark.World.2013.720p.WEB-DL.Rus.Eng.HDCLUB.mkv', 'Thor', 'Thor', '', '', '', '', '', 14, 4099320914, '2014-02-27 12:43:21', 'single', 1, 0, 0, 0, 0, 0, 0, '2014-02-27 12:43:21', '0000-00-00 00:00:00', 'yes', 'no', 1, 0, 0, 'no', 'yes', 'yes', 1, '', '');

+----+--------------------+--------------+--------+----------------------+---------+---------+------------+------+---------------------------------------------------------------------+
| id | select_type        | table        | type   | possible_keys        | key     | key_len | ref        | rows | extra                                                               |
+----+--------------------+--------------+--------+----------------------+---------+---------+------------+------+---------------------------------------------------------------------+
|  1 | PRIMARY            | t            | ref    | PRIMARY,visible,vnsi | visible | 1       | const      | 1    | Using index condition; Using where; Using temporary; Using filesort |
|  1 | PRIMARY            | c            | eq_ref | PRIMARY              | PRIMARY | 4       | t.category | 1    |                                                                     |
|  1 | PRIMARY            | u            | eq_ref | PRIMARY,user         | PRIMARY | 4       | t.owner    | 1    |                                                                     |
|  1 | PRIMARY            | ti           | ref    | tagged               | tagged  | 4       | t.id       | 1    | Using where; Using index                                            |
|  1 | PRIMARY            | ta           | eq_ref | PRIMARY              | PRIMARY | 4       | ti.tag     | 1    | Using where                                                         |
|  2 | DEPENDENT SUBQUERY | readtorrents | eq_ref | read                 | read    | 8       | const,func | 1    | Using where; Using index                                            |
+----+--------------------+--------------+--------+----------------------+---------+---------+------------+------+---------------------------------------------------------------------+

И вот результат, как по мне так ужасен...

У кого какие идеи?

[Apmyp]

Стоит попробовать тэги тянуть без джойнов.
Замерить скорость когда тэгов скажем 10к, 100к.

Еще словарь в памяти держать можно - обходить быстрее.

[mft39]

Можно ещё глянуть, как на Gazelle это реализовано. https://github.com/WhatCD/Gazelle

[yunasc]

HighQuality, что именно ты предлагаешь?
Не понял

[Apmyp]

Зачем париться на счет скорости, если прямо сейчас проблем нет?

[yunasc]

Затем что лучше пусть оно сразу работает чуть-чуть медленней, чем потом работает медленно.

[vanechek233]

а может забить на хостинг и использовать сфинкс, ибо сейчас vds любому нищеброду по карману.

[yunasc]

не хочу забивать на хостинги, ибо много кто ставит трекера дома, под виндой.

я знаю что это плохо и такой трекер не проживет долго, ибо скорее всего винду убьет, или диск сдохнет.
но под виндой поднимать сфинкс - не так просто.
цель именно что скрипт установки делает всё за тебя, а скрипт сис админом работать не умеет.

но ты можешь дать конфиг сфинкса под теги и пример использования (я со сфинксом не работал), могу поколупать...

[Apmyp]

Не Sphinx, а elasticsearch ;)

[yunasc]

Всё равно одна картина...

[vanechek233]

а в чем преимущество elasticsearch над sphinx

[yunasc]

realtime индексы без ограничений.

я все еще жду примера конфига под sphinx для замены поиска по torrents.tags LIKE '%тег%'

[yunasc]

Кажется что наиболее разумным вариантом, в таком случае, будет сначала сделать

$ids_list = mysql_fetch_row(sql_query(
"SELECT GROUP_CONCAT(t.id) FROM torrents INNER JOIN torrent_tags AS tt ON tt.tid = t.id
WHERE tt.tag IN ('animation', 'pr0n', 'action') GROUP BY t.id
ORDER BY t.not_sticky DESC, t.id DESC LIMIT 0,25"));

А потом в browse.php делать выборку по этим ID:

WHERE t.id IN ($ids_list)

Для блока релизов такая фишка серьезно ускорила его работу (когда релизов, у меня, уже больше чем 10000)

Есть идеи получше?

[usarise]

Может попробовать использовать одну таблицу tags добавляя к каждому уникальному тегу список id релизов и по ним выборку делать?

К примеру так

CREATE TABLE IF NOT EXISTS `test_tags` (
  `id` int(10) unsigned NOT NULL AUTO_INCREMENT,
  `name` varchar(50) NOT NULL DEFAULT '',
  `post_id` text NOT NULL,
  PRIMARY KEY (`id`),
  UNIQUE KEY `name` (`name`)
) ENGINE=MyISAM AUTO_INCREMENT=2;

INSERT INTO `test_tags` (`id`, `name`, `post_id`) VALUES
(1, 'Alpha', 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23,3224,3225,3226,3227,3228,3229,3230,3231,3232,3233,3234,3235,3236,3237,3238,3239,3240,3241,3242,3243,3244,3245,3246,3247,3248,3249,3250,3251,3252,3253,3254,3255,3256,3257,3258,3259,3260,3261,3262,3263,3264,3265,3266,3267,3268,3269,3270,3271,3272,3273,3274,3275,3276,3277,3278,3279,3280,3281,3282,3283,3284,3285,3286,3287,3288,3289,3290,3291,3292,3293,3294,3295,3296,3297,3298,3299,3300,3301,3302,3303,3304,3305,3306,3307,3308,3309,3310,3311,3312,3313,3314,3315,3316,3317,3318,3319,3320,3321,3322,3323,3324,3325,3326,3327,3328,3329,3330,3331,3332,3333,3334,3335,3336,3337,3338,3339,3340,3341,3342,3343,3344,3345,3346,3347,3348,3349,3350,3351,3352,3353,3354,3355,3356,3357,3358,3359,3360,3361,3362,3363,3364,3365,3366,3367,3368,3369,3370,3371,3372,3373,3374,3375,3376,3377,3378,3379,3380,3381,3382,3383,3384,3385,3386,3387,3388,3389,3390,3391,3392,3393,3394,3395,3396,3397,3398,3399,3400,3401,3402,3403,3404,3405,3406,3407,3408,3409,3410,3411,3412,3413,3414,3415,3416,3417,3418,3419,3420,3421,3422,3423,3424,3425,3426,3427,3428,3429,3430,3431,3432,3433,3434,3435,3436,3437,3438,3439,3440,3441,3442,3443,3444,3445,3446,3447,3448,3449,3450,3451,3452,3453,3454,3455,3456,3457,3458,3459,3460,3461,3462,3463,3464,3465,3466,3467,3468,3469,3470,3471,3472,3473,3474,3475,3476,3477,3478,3479,3480,3481,3482,3483,3484,3485,3486,3487,3488,3489,3490,3491,3492,3493,3494,3495,3496,3497,3498,3499,3500,3501,3502,3503,3504,3505,3506,3507,3508,3509,3510,3511,3512,3513,3514,3515,3516,3517,3518,3519,3520,3521,3522,3523,3524,3525,3526,3527,3528,3529,3530,3531,3532,3533,3534,3535,3536,3537,3538,3539,3540,3541,3542,3543,3544,3545,3546,3547,3548,3549,3550,3551,3552,3553,3554,3555,3556,3557,3558,3559,3560,3561,3562,3563,3564,3565,3566,3567,3568,3569,3570,3571,3572,3573,3574,3575,3576,3577,3578,3579,3580,3581,3582,3583,3584,3585,3586,3587,3588,3589,3590,3591,3592,3593,3594,3595,3596,3597,3598,3599,3600,3601,3602,3603,3604,3605,3606,3607,3608,3609,3610,3611,3612,3613,3614,3615,3616,3617,3618,3619,3620,3621,3622,3623,3624,3625,3626,3627,3628,3629,3630,3631,3632,3633,3634,3635,3636,3637,3638,3639,3640,3641,3642,3643,3644,3645,3646,3647,3648,3649,3650,3651,3652,3653,3654,3655,3656,3657,3658,3659,3660,3661,3662,3663,3664,3665,3666,3667,3668,3669,3670,3671,3672,3673,3674,3675,3676,3677,3678,3679,3680,3681,3682,3683,3684,3685,3686,3687,3688,3689,3690,3691,3692,3693,3694,3695,3696,3697,3698,3699,3700,3701,3702,3703,3704,3705,3706,3707,3708,3709,3710,3711,3712,3713,3714,3715,3716,3717,3718,3719,3720,3721,3722,3723,3724,3725,3726,3727,3728,3729,3730,3731,3732,3733,3734,3735,3736,3737,3738,3739,3740,3741,3742,3743,3744,3745,3746,3747,3748,3749,3750,3751,3752,3753,3754,3755,3756,3757,3758,3759,3760,3761,3762,3763,3764,3765,3766,3767,3768,3769,3770,3771,3772,3773,3774,3775,3776,3777,3778,3779,3780,3781,3782,3783,3784,3785,3786,3787,3788,3789,3790,3791,3792,3793,3794,3795,3796,3797,3798,3799,3800,3801,3802,3803,3804,3805,3806,3807,3808,3809,3810,3811,3812,3813,3814,3815,3816,3817,3818,3819,3820,3821,3822,3823,3824,3825,3826,3827,3828,3829,3830,3831,3832,3833,3834,3835,3836,3837,3838,3839,3840,3841,3842,3843,3844,3845,3846,3847,3848,3849,3850,3851,3852,3853,3854,3855,3856,3857,3858,3859,3860,3861,3862,3863,3864,3865,3866,3867,3868,3869,3870,3871,3872,3873,3874,3875,3876,3877,3878,3879,3880,3881,3882,3883,3884,3885,3886,3887,3888,3889,3890,3891,3892,3893,3894,3895,3896,3897,3898,3899,3900,3901,3902,3903,3904,3905,3906,3907,3908,3909,3910,3911,3912,3913,3914,3915,3916,3917,3918,3919,3920,3921,3922,3923,3924,3925,3926,3927,3928,3929,3930,3931,3932,3933,3934,3935,3936,3937,3938,3939,3940,3941,3942,3943,3944,3945,3946,3947,3948,3949,3950,3951,3952,3953,3954,3955,3956,3957,3958,3959,3960,3961,3962,3963,3964,3965,3966,3967,3968,3969,3970,3971,3972,3973,3974,3975,3976,3977,3978,3979,3980,3981,3982,3983,3984,3985,3986,3987,3988,3989,3990,3991,3992,3993,3994,3995,3996,3997,3998,3999,4000,4001,4002,4003,4004,4005,4006,4007,4008,4009,4010,4011,4012,4013,4014,4015,4016,4017,4018,4019,4020,4021,4022,4023,4024,4025,4026,4027,4028,4029,4030,4031,4032,4033,4034,4035,4036,4037,4038,4039,4040,4041,4042,4043,4044,4045,4046,4047,4048,4049,4050,4051,4052,4053,4054,4055,4056,4057,4058,4059,4060,4061,4062,4063,4064,4065,4066,4067,4068,4069,4070,4071,4072,4073,4074,4075,4076,4077,4078,4079,4080,4081,4082,4083,4084,4085,4086,4087,4088,4089,4090,4091,4092,4093,4094,4095,4096,4097,4098,4099,4100,4101,4102,4103,4104,4105,4106,4107,4108,4109,4110,4111,4112,4113,4114,4115,4116,4117,4118,4119,4120,4121,4122,4123,4124,4125,4126,4127,4128,4129,4130,4131,4132,4133,4134,4135,4136,4137,4138,4139,4140,4141,4142,4143,4144,4145,4146,4147,4148,4149,4150,4151,4152,4153,4154,4155,4156,4157,4158,4159,4160,4161,4162,4163,4164,4165,4166,4167,4168,4169,4170,4171,4172,4173,4174,4175,4176,4177,4178,4179,4180,4181,4182,4183,4184,4185,4186,4187,4188,4189,4190,4191,4192,4193,4194,4195,4196,4197,4198,4199,4200,4201,4202,4203,4204,4205,4206,4207,4208,4209,4210,4211,4212,4213,4214,4215,4216,4217,4218,4219,4220,4221,4222,4223,4224,4225,4226,4227,4228,4229,4230,4231,4232,4233,4234,4235,4236,4237,4238,4239,4240,4241,4242,4243,4244,4245,4246,4247,4248,4249,4250,4251,4252,4253,4254,4255,4256,4257,4258,4259,4260,4261,4262,4263,4264,4265,4266,4267,4268,4269,4270,4271,4272,4273,4274,4275,4276,4277,4278,4279,4280,4281,4282,4283,4284,4285,4286,4287,4288,4289,4290,4291,4292,4293,4294,4295,4296'),
(2, 'Beta', '1415,1416,1417,1418,1419,1420,1421,1422,1423,1424,1425,1426,1427,1428,1429,1430,1431,1432,1433,1434,1435,1436,1437,1438,1439,1440,1441,1442,1443,1444,1445,1446,1447,1448,1449,1450');

как и в варианте выше получить список id

$query = "SELECT post_id FROM test_tags WHERE name = 'Alpha'";
$result = mysqli_query($link, $query);
$row = mysqli_fetch_assoc($result);

и в browse.php

WHERE t.id IN ({$row['post_id']})

[yunasc]

А что в таком случае говорит explain и каков размер таблицы индекса?

Я с телефона, пока не тестировал твой вариант.

[usarise]

explain

+------+-------------+-----------+-------+---------------+------+---------+-------+------+-------+
| id   | select_type | table     | type  | possible_keys | key  | key_len | ref   | rows | Extra |
+------+-------------+-----------+-------+---------------+------+---------+-------+------+-------+
|    1 | SIMPLE      | test_tags | const | name          | name | 602     | const |    1 |       |
+------+-------------+-----------+-------+---------------+------+---------+-------+------+-------+

таблица индекса 8кб
сама таблица 21кб

[yunasc]

Я вот о чем подумал - как это будет в конце, когда у тебя 50-60 тегов и 15000 торрентов?

Не думаю, что, что перестроить коллекцию (а так мы будем называть набор торрентов под одним тегом) можно будет быстро.

Но зато запрос быстр - и это хорошо.

P.S: Есть еще один плюс, в том что код уже наполовину в таком случае готов для SphinxQL (только подключись да сделай запрос чуть-чуть по другому)

[usarise]

хм.. например если удалить тег из раздачи или удалить весь торрент?

[yunasc]

Нет, если удалить, например, сотню торрентов.

Не уверен, что сложности с поддержкой коллекции стоят этих усилий...

[usarise]

Как то не подумал даже..
Изначально сомневался в этом методе, но плюсы выглядят соблазнительно :)

Хотя навскидку получится что то вроде
UPDATE sun_tags SET post_id = replace(post_id,',$id,',',') WHERE id = '1'
по идее не так и медленно.

[yunasc]

А если у тебя нужный ID идет первым в строке? ;)

[usarise]

Как вариант добавлять $id, а по умолчанию будет

DEFAULT ','

в итоге :)

,1,5,6,7,8,9,10,11,12,13,14,

оно и без того жутковато выглядит при 15000 :)
но действительно могут быть и другие проблемы..

Я пожалуй попробую создать полноценную реализацию и добавить в реальный проект по возможности в качестве эксперимента.
После уже взвешу все минусы и плюсы.

[yunasc]

Ну "," это уже пошли костыли :)

Ну попробуй, а там и узнаем что лучше :)

[yunasc]

@sunrise21 Ну как, попробовал? ;)

[usarise]

Да :)
Получилось в итоге так ->

CREATE TABLE IF NOT EXISTS `test_tags` (
  `id` int(10) unsigned NOT NULL AUTO_INCREMENT,
  `name` varchar(50) NOT NULL DEFAULT '',
  `post_id` text NOT NULL,
  PRIMARY KEY (`id`),
  UNIQUE KEY `name` (`name`)
) ENGINE=MyISAM AUTO_INCREMENT=3;

INSERT INTO `test_tags` (`id`, `name`, `post_id`) VALUES
(1, 'elementary', ',1,2,3,4,5,6,7,'),
(2, 'marvel', ',1,2,3,4,5,6,7,'),
(3, '720p', ',1,2,3,4,5,6,7,');

CREATE TABLE IF NOT EXISTS `test_tags_id` (
  `tag_id` int(11) NOT NULL,
  `post_id` int(11) NOT NULL,
  PRIMARY KEY (`id`),
  KEY `tags_id` (`tag_id`),
  KEY `post_id` (`post_id`)
) ENGINE=MyISAM;

INSERT INTO `test_tags_id` (`tag_id`, `post_id`) VALUES
(1, 1),
(1, 2),
(1, 3),
(1, 4),
(1, 5),
(1, 6),
(1, 7),
(2, 1),
(2, 2),
(2, 3),
(2, 4),
(2, 5),
(2, 6),
(2, 7),
(3, 1),
(3, 2),
(3, 3),
(3, 4),
(3, 5),
(3, 6),
(3, 7);

удаление ->

$res = sql_query("SELECT tag_id FROM test_tags_id WHERE post_id = {$id}");
    while ($row = mysql_fetch_assoc($res)) {
        sql_query("UPDATE test_tags SET post_id = replace(post_id,',{$id},',',') WHERE id = '{$row['tag_id']}'");
    }
sql_query('DELETE FROM test_tags_id WHERE post_id = '.$id);

Пробовал удалить более 200 торрентов за раз с 7ю тегами в каждом и
в итоге на пол секунды медленнее чем без тегов..
На глаз на секунду даже :)

С запятой впереди все просто:
если добавление нового тега -> INSERT ',{$tid},'
если в существующий -> UPDATE '{$tid},' в конец.

У себя реализовал на проектах где нет возможности физического удаления.

[lolyworlds]

слишком много лишнего тут понаписали, все проще и быстрее можно.
таблица тегов лефт джонится с отдельной таблицей бровс и поиск по лайк шустро работает.

https://tbdev-forum.top/viewtopic.php?f=53&t=98&p=1104#p1104