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From: Wladimir <laanwj@gmail.com>
To: 潘庆庆 <qingqing.pan@okcoin.com>
Cc: bitcoin-development <bitcoin-development@lists.sourceforge.net>
Subject: Re: [Bitcoin-development] What is the danger if bitcoind startted with -flushwallet=false ?
Date: Wed, 13 Aug 2014 22:29:28 +0200	[thread overview]
Message-ID: <CA+s+GJCho_X3DT06evc_caHe+bpNv8sg3gUP4-dDqh7STQb-hQ@mail.gmail.com> (raw)
In-Reply-To: <tencent_6F055A157BDF0BD41143F75A@qq.com>

On Wed, Aug 13, 2014 at 6:22 PM, 潘庆庆 <qingqing.pan@okcoin.com> wrote:
> Hi everybody,
>
>     I tried to reduce the IO of bitcoind, and I found '-flushwallet=false'. After trying it, my IO reduced greatly.
>     But why 'flushwallet' is true by default? Is there any danger if closing the flush wallet thread?
>     I lost all my coins in testnet after one crash with '-flushwallet=false', was this because of no flush wallet thread?

When flushwallet is disabled, the wallet is not flushed (written to
disk in a self-contained state) periodically. This means that there's
a larger chance that the wallet database is in inconsistent state when
the process stops unexpectedly. This can happen either due to a crash,
or an external cause such as the power turning off unexpectedly.

With the wallet in non-self-contained state, the next time that you
start bitcoind BerkeleyDB will have to process log files. There is a
non-zero chance that this will fail and manual recovery is needed.

As the wallet is usually critical, it is unwise to disable that option.

Wladimir



       reply	other threads:[~2014-08-13 20:29 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <tencent_6F055A157BDF0BD41143F75A@qq.com>
2014-08-13 20:29 ` Wladimir [this message]
2014-08-13 16:27 [Bitcoin-development] What is the danger if bitcoind startted with -flushwallet=false ? KingK.Pan

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