f (!empty($uidarr)) {
$uids = array();
$update = array();
foreach ($uidarr as $_uid => $n) {
$uids[] = $_uid;
$update[$_uid] = array('articles-' => $n);
'mysql' != $conf['cache']['type'] and cache_delete('user-' . $_uid);
}
user_big_update(array('uid' => $uids), $update);
}
!empty($operate_create) && function_exists('operate_big_insert') and operate_big_insert($operate_create);
return TRUE;
}
// 大数据量容易超时 删除用户时使用,删除主题 回复 栏目统计 附件 全站统计
function well_thread_delete_all_by_uid($uid)
{
// 用户主题数
$user = user_read_cache($uid);
set_time_limit(0);
// 删除所有回复
if ($user['comments']) {
$postist = comment_pid_find_by_uid($uid, 1, $user['comments'], FALSE);
$pidarr = array();
foreach ($postist as $val) {
$pidarr[] = $val['pid'];
}
unset($postist);
!empty($pidarr) and comment_delete_by_pids($pidarr);
}
if ($user['articles']) {
// 如果主题、附件和回复数量太大会超时
$tidlist = thread_tid_find_by_uid($uid, 1, $user['articles'], FALSE, 'tid', array('tid'));
$tidarr = array();
foreach ($tidlist as $val) {
$tidarr[] = $val['tid'];
}
unset($tidlist);
!empty($tidarr) and well_thread_delete_all($tidarr);
}
return TRUE;
}
// 搜索标题
function well_thread_find_by_keyword($keyword, $d = NULL)
{
if (empty($keyword)) return NULL;
$db = $_SERVER['db'];
$d = $d ? $d : $db;
if (!$d) return FALSE;
$threadlist = db_sql_find("SELECT * FROM `{$d->tablepre}website_thread` WHERE subject LIKE '%$keyword%' LIMIT 60;", 'tid', $d);
if ($threadlist) {
$threadlist = arrlist_multisort($threadlist, 'tid', FALSE);
foreach ($threadlist as &$thread) {
well_thread_format($thread);
// 关键词标色
//$thread['subject'] = comment_highlight_keyword($thread['subject'], $keyword);
}
}
return $threadlist;
}
// 查找 最后评论 lastpid
function well_thread_find_lastpid($tid)
{
$arr = comment_pid_read(array('tid' => $tid), array('pid' => -1), array('pid'));
$lastpid = empty($arr) ? 0 : $arr['pid'];
return $lastpid;
}
// 更新最后的 uid
function well_thread_update_last($tid)
{
if (empty($tid)) return FALSE;
$lastpid = well_thread_find_lastpid($tid);
if (empty($lastpid)) return FALSE;
$lastpost = comment_read($lastpid);
if (empty($lastpost)) return FALSE;
$r = well_thread_update($tid, array('lastuid' => $lastpost['uid']));
return $r;
}
function well_thread_maxid()
{
$n = db_maxid('website_thread', 'tid');
return $n;
}
// 主题状态 0:通过 1~9 审核:1待审核 10~19:10退稿 11逻辑删除
function well_thread_format(&$thread)
{
global $gid, $uid, $forumlist;
$conf = _SERVER('conf');
if (empty($thread)) return;
$thread['create_date_fmt'] = humandate($thread['create_date']);
$thread['last_date_fmt'] = humandate($thread['last_date']);
$thread['create_date_fmt_ymd'] = date('Y-m-d', $thread['create_date']);
$thread['last_date_fmt_ymd'] = date('Y-m-d', $thread['last_date']);
$user = user_read_cache($thread['uid']);
$onlinelist = online_user_list_cache();
$user['online_status'] = isset($onlinelist[$user['uid']]) ? 1 : 0;
$thread['username'] = $user['username'];
$thread['user_avatar_url'] = array_value($user, 'avatar_url');
$thread['user'] = user_safe_info($user);
unset($user);
$forum = array_value($forumlist, $thread['fid']);
$thread['forum_name'] = array_value($forum, 'name');
$thread['forum_url'] = array_value($forum, 'url');
if ($thread['last_date'] == $thread['create_date']) {
$thread['last_date_fmt'] = '';
$thread['lastuid'] = 0;
$thread['lastusername'] = '';
} else {
$lastuser = $thread['lastuid'] ? user_read_cache($thread['lastuid']) : array();
$thread['lastusername'] = $thread['lastuid'] ? $lastuser['username'] : lang('guest');
$thread['lastuser'] = $thread['lastuid'] ? user_safe_info($lastuser) : array();
unset($lastuser);
}
$thread['url'] = url('read-' . $thread['tid'], '', FALSE);
if ($conf['url_rewrite_on'] > 1) {
!empty($forum['well_alias']) and $thread['url'] = url(urlencode($forum['well_alias'])."-$thread[create_date]a$thread[tid]", '', FALSE);
} else {
$thread['url'] = url("read-$thread[create_date]a$thread[tid]", '', FALSE);
}
$thread['user_url'] = url('user-' . $thread['uid']);
$thread['sticky_class'] = '';
if ($thread['sticky'] > 0) {
if (1 == $thread['sticky']) {
$thread['sticky_class'] = 'success';
} elseif (2 == $thread['sticky']) {
$thread['sticky_class'] = 'warning';
} elseif (3 == $thread['sticky']) {
$thread['sticky_class'] = 'danger';
}
}
$nopic = view_path() . 'img/nopic.png';
if ($thread['icon']) {
$attach_dir_save_rule = array_value($conf, 'attach_dir_save_rule', 'Ym');
$day = date($attach_dir_save_rule, $thread['icon']);
$thread_format_icon_default = 1;
if (1 == $thread_format_icon_default) {
// 本地文件绝对路径
$destfile = $conf['upload_path'] . 'thumbnail/' . $day . '/' . $thread['uid'] . '_' . $thread['tid'] . '_' . $thread['icon'] . '.jpeg';
// 本地
$thread['icon_fmt'] = is_file($destfile) ? file_path($thread['attach_on']) . 'thumbnail/' . $day . '/' . $thread['uid'] . '_' . $thread['tid'] . '_' . $thread['icon'] . '.jpeg' : $nopic;
if (1 == $conf['attach_on'] && 1 == $thread['attach_on']) {
// 云储存
$thread['icon_fmt'] = file_path($thread['attach_on']) . 'thumbnail/' . $day . '/' . $thread['uid'] . '_' . $thread['tid'] . '_' . $thread['icon'] . '.jpeg';
} elseif (2 == $conf['attach_on'] && 2 == $thread['attach_on']) {
// 图床 未上传成功 本地图片在的话使用本地,不在则默认
$thread['icon_fmt'] = $thread['image_url'] ? $thread['image_url'] : $thread['icon_fmt'];
}
}
} else {
$thread['icon_fmt'] = $nopic;
}
// 回复页面
$thread['pages'] = ceil($thread['posts'] / $conf['comment_pagesize']);
$thread['tag_fmt'] = $thread['tag'] ? xn_json_decode($thread['tag']) : '';
// 权限判断
$thread['allowupdate'] = ($uid == $thread['uid']) || forum_access_mod($thread['fid'], $gid, 'allowupdate');
$thread['allowdelete'] = (group_access($gid, 'allowuserdelete') and $uid == $thread['uid']) || forum_access_mod($thread['fid'], $gid, 'allowdelete');
$thread['allowtop'] = forum_access_mod($thread['fid'], $gid, 'allowtop');
$thread = well_thread_safe_info($thread);
}
function well_thread_format_last_date(&$thread)
{
if ($thread['last_date'] != $thread['create_date']) {
$thread['last_date_fmt'] = humandate($thread['last_date']);
} else {
$thread['create_date_fmt'] = humandate($thread['create_date']);
}
}
// 对 $threadlist 权限过滤
function well_thread_list_access_filter(&$threadlist, $gid)
{
global $forumlist;
if (empty($threadlist)) return NULL;
foreach ($threadlist as $tid => $thread) {
if (empty($forumlist[$thread['fid']]['accesson'])) continue;
if ($thread['sticky'] > 0) continue;
if (!forum_access_user($thread['fid'], $gid, 'allowread')) {
unset($threadlist[$tid]);
}
}
}
function well_thread_safe_info($thread)
{
unset($thread['userip'], $thread['user']['threads'], $thread['user']['posts'], $thread['user']['credits'], $thread['user']['golds'], $thread['user']['money']);
empty($thread['user']) || $thread['user'] = user_safe_info($thread['user']);
return $thread;
}
// 过滤安全数据
function well_thread_filter(&$val)
{
unset($val['userip'], $val['fid'], $val['flagid'], $val['type'], $val['user'], $val['create_date']);
}
//------------------------ 其他方法 ------------------------
// 集合主题tid,统一拉取,避免多次查询thread表
function thread_unified_pull($arr)
{
global $gid, $fid;
$stickylist = array_value($arr, 'stickylist', array());
$tidlist = array_value($arr, 'tidlist', array());
//$fid = array_value($arr, 'fid');
// 合并过滤空数组
//$tidlist = array_filter($stickylist + $tidlist);
$tidarrlist = $tidlist = $stickylist + $tidlist;
// 版块自定义
list($flaglist, $flagtids) = flag_thread_by_fid($fid);
empty($flagtids) || $tidarrlist += $flagtids;
unset($flagtids);
// 在这之前合并所有二维数组 tid值为键/array('tid值' => tid值)
$tidarr = empty($tidarrlist) ? array() : arrlist_values($tidarrlist, 'tid');
// 在这之前使用array_merge()前合并所有一维数组 tid/array(1,2,3)
if (empty($tidarr)) return NULL;
$tidarr = array_unique($tidarr);
// 主题相关统一遍历后再归类
$arrlist = well_thread_find($tidarr, count($tidarr));
// 过滤没有权限访问的主题 / filter no permission thread
well_thread_list_access_filter($arrlist, $gid);
$threadlist = array();
foreach ($arrlist as $_tid => &$_thread) {
$_thread = well_thread_safe_info($_thread);
// 归类列表数据
isset($tidlist[$_thread['tid']]) and $threadlist[$_tid] = $_thread;
// flag thread
if (!empty($flaglist)) {
foreach ($flaglist as $key => $val) {
if (isset($val['tids']) && in_array($_thread['tid'], $val['tids'])) {
$flaglist[$key]['list'][array_search($_thread['tid'], $val['tids'])] = $_thread;
ksort($flaglist[$key]['list']);
}
}
}
}
// 按之前tidlist排序
$threadlist = array2_sort_key($threadlist, $tidlist, 'tid');
unset($arrlist, $tidlist);
$arr = array('threadlist' => $threadlist, 'flaglist' => $flaglist);
return $arr;
}
// read.php 详情页其他主题调用,集合tid统一拉取数据,最后归类
function thread_other_pull($thread)
{
global $forumlist, $gid;
$fid = array_value($thread, 'fid');
$forum = array_value($forumlist, $fid);
if (empty($forum)) return NULL;
//$tid = array_value($thread, 'tid');
//$tag_fmt = array_value($thread, 'tag_fmt');
$arrlist = array();
$tidlist = array();
// 版块自定义
list($flaglist, $flagtids) = flag_thread_by_fid($fid);
empty($flagtids) || $tidlist += $flagtids;
unset($flagtids);
// 在这之前合并所有二维数组 tid值为键/array('tid值' => tid值)
$tidarr = empty($tidlist) ? array() : arrlist_values($tidlist, 'tid');
// 在这之前使用array_merge()前合并所有一维数组 tid/array(1,2,3)
if (empty($tidarr)) return NULL;
$tidarr = array_unique($tidarr);
// 主题相关统一遍历后再归类
$threadlist = well_thread_find($tidarr, count($tidarr));
// 过滤没有权限访问的主题 / filter no permission thread
well_thread_list_access_filter($threadlist, $gid);
foreach ($threadlist as &$_thread) {
$_thread = well_thread_safe_info($_thread);
// flag thread
if (!empty($flaglist)) {
foreach ($flaglist as $key => $val) {
if (isset($val['tids']) && in_array($_thread['tid'], $val['tids'])) {
$flaglist[$key]['list'][array_search($_thread['tid'], $val['tids'])] = $_thread;
ksort($flaglist[$key]['list']);
}
}
}
}
unset($threadlist);
if (!empty($flaglist)) {
foreach ($flaglist as &$val) {
$i = 0;
if (!isset($val['list'])) continue;
foreach ($val['list'] as &$v) {
++$i;
$v['i'] = $i;
}
}
$arrlist['flaglist'] = $flaglist;
unset($flaglist);
}
return $arrlist;
}
//--------------------------cache--------------------------
// 已格式化 从缓存中读取,避免重复从数据库取数据
function well_thread_read_cache($tid)
{
global $conf;
$key = 'website_thread_' . $tid;
static $cache = array(); // 用静态变量只能在当前 request 生命周期缓存,跨进程需要再加一层缓存:redis/memcached/xcache/apc
if (isset($cache[$key])) return $cache[$key];
if ('mysql' == $conf['cache']['type']) {
$r = well_thread_read($tid);
} else {
$r = cache_get($key);
if (NULL === $r) {
$r = well_thread_read($tid);
$r and cache_set($key, $r, 1800);
}
}
$cache[$key] = $r ? $r : NULL;
return $cache[$key];
}
?>
fastdfs工作原理编程频道|福州电脑网
fastdfs工作原理
系统教程9420
更新时间:2026-04-10 02:35:41 2024年6月5日发(作者:)
fastdfs工作原理
FastDFS(Fast Distributed File System)是一个分布式文件系统,
它由Tracker Server和多个Storage Server组成。
Tracker Server负责调度和管理所有的Storage Server。当客户
端需要上传文件时,它首先连接Tracker Server,并请求一个
可用的Storage Server来存储文件。Tracker Server会根据一定
的策略选择一个合适的Storage Server,并将其信息返回给客
户端。
客户端接收到Storage Server的信息后,就可以直接和Storage
Server建立连接,并将文件上传到指定的Storage Server上。
当文件上传完毕后,Storage Server会将文件存储在本地的磁
盘上,并返回一个文件ID给客户端。
客户端在需要下载文件时,同样先连接Tracker Server,并根
据文件ID获取文件存储的Storage Server的信息。然后,客户
端和Storage Server建立连接,并从Storage Server上下载文件。
FastDFS还支持文件的删除和修改操作。当客户端需要删除文
件时,它同样先连接Tracker Server,并根据文件ID获取文件
存储的Storage Server的信息。然后,客户端和Storage Server
建立连接,并发送删除文件的请求。Storage Server在接收到
请求后,会将文件从本地磁盘上删除。
以上就是FastDFS的工作原理。通过Tracker Server和Storage
Server的配合,实现了文件的分布式存储和访问。客户端通过
Tracker Server获取Storage Server的信息,并直接和Storage
Server进行文件的上传、下载、删除和修改操作。这样的分布
式架构可以提高文件的存储和访问性能,同时也提供了高可用
性和可扩展性。
本文发布于:2024-06-05,感谢您对本站的认可!
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