<p class="shortdesc"></p> <table class="table frame-all" id="limit__table_j32_h2z_cvb"><caption></caption><colgroup><col style="width:30.48780487804878%"><col style="width:69.51219512195121%"></colgroup><thead class="thead"> <tr class="row"> <th class="entry" id="limit__table_j32_h2z_cvb__entry__1">序号</th> <th class="entry" id="limit__table_j32_h2z_cvb__entry__2">限制说明</th> </tr> </thead><tbody class="tbody"> <tr class="row"> <td class="entry" headers="limit__table_j32_h2z_cvb__entry__1 ">1</td> <td class="entry" headers="limit__table_j32_h2z_cvb__entry__2 "> <p class="p">暂时不支持为Windows操作系统的云主机开通文件备份服务。</p> </td> </tr> <tr class="row"> <td class="entry" headers="limit__table_j32_h2z_cvb__entry__1 ">2</td> <td class="entry" headers="limit__table_j32_h2z_cvb__entry__2 "> <p class="p">备份时，如果文件正在被其它应用更改，但对文件有读权限，会导致备份数据不完整，需要从应用层保证要备份数据的完整性。</p> </td> </tr> <tr class="row"> <td class="entry" headers="limit__table_j32_h2z_cvb__entry__1 ">3</td> <td class="entry" headers="limit__table_j32_h2z_cvb__entry__2 "> <p class="p">备份时，如果文件被其它进程占用或对文件没有读权限，会导致备份数据不完整，备份后状态会显示部分完成。</p> </td> </tr> <tr class="row"> <td class="entry" headers="limit__table_j32_h2z_cvb__entry__1 ">4</td> <td class="entry" headers="limit__table_j32_h2z_cvb__entry__2 "> <p class="p">文件备份会过滤掉"/proc", "/dev", "/sys"目录。</p> </td> </tr> <tr class="row"> <td class="entry" headers="limit__table_j32_h2z_cvb__entry__1 ">5</td> <td class="entry" headers="limit__table_j32_h2z_cvb__entry__2 "> <p class="p">单个任务的目录总数不超过1,000,000个。</p> </td> </tr> <tr class="row"> <td class="entry" headers="limit__table_j32_h2z_cvb__entry__1 ">6</td> <td class="entry" headers="limit__table_j32_h2z_cvb__entry__2 ">单个目录的文件（含目录）数不能超过1024万个。</td> </tr> <tr class="row"> <td class="entry" headers="limit__table_j32_h2z_cvb__entry__1 ">7</td> <td class="entry" headers="limit__table_j32_h2z_cvb__entry__2 ">软链接文件和套接字文件只会备份和恢复它们本身。</td> </tr> </tbody></table>