How to avoid my char from being rollback when server crash.

You can use

/save

command periodically to force save your char into database. Don't use it too frequent as the server normally will save your char every 2 minutes. But for safe precaution, use it after transaction (player to player, GM to player (event prizes for example)), when you login too long and afraid you will del-level so much.

If you use it too often, server will be overwhelming busy and may affect your gameplay experience.

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Why rollback happen?
When world server crash, it has so little time to save all character permanently into database. But that split second seem not enough to save all chars, so one or 2 will miss out. And that char will experience rollback. I am investigating this issue and try to come out with quick fix for this. Until that moment, use /save command (it will not say anything, but your char is save. You can check on ranking page, that it will update your level).

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Is that some command that is originally designed for GM use? Maybe one can put a time limit on how frequent it should be used, like the /b command

we have autosave feature...that will cover that function. only when you recieve item like event prize, to double check, use that command..

thx admin for this..