重启Iotdb Server，数据丢失

[凌战 <m1...@163.com>]

hi，when i restarted Iotdb server，I found that the data inserted in the morning was lost，but the data  inserted yesterday still exists。
I suspected that the  data inserted in the morning was still in the memtable and has not flushed into disk. So when i restarted Iotdb server,the data was lost. In addition, I disable the wal.
Is it possible ? How can I avoid it ?


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凌战
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m18340872285@163.com
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Re: 重启Iotdb Server，数据丢失

[Jialin Qiao <qj...@mails.tsinghua.edu.cn>]

Hi,

This is due to the configuration (disabling WAL). If you disable the WAL, the data in current memtable may be lost.

By default, the enable_wal is true. You could recover it back to avoid this.

I wonder why do you disable the wal...

Thanks,
--
Jialin Qiao
School of Software, Tsinghua University

乔嘉林
清华大学 软件学院

> -----原始邮件-----
&gt; 发件人: "凌战" <m1...@163.com>
&gt; 发送时间: 2020-12-18 11:42:50 (星期五)
&gt; 收件人: "dev@iotdb.apache.org" <de...@iotdb.apache.org>
&gt; 抄送: 
&gt; 主题: 重启Iotdb Server，数据丢失
&gt; 
&gt; hi，when i restarted Iotdb server，I found that the data inserted in the morning was lost，but the data  inserted yesterday still exists。
&gt; I suspected that the  data inserted in the morning was still in the memtable and has not flushed into disk. So when i restarted Iotdb server,the data was lost. In addition, I disable the wal.
&gt; Is it possible ? How can I avoid it ?
&gt; 
&gt; 
&gt; | |
&gt; 凌战
&gt; |
&gt; |
&gt; m18340872285@163.com
&gt; |
&gt; 签名由网易邮箱大师定制
</d...@163.com>