* [Bitcoin-development] What is the danger if bitcoind startted with -flushwallet=false ?
@ 2014-08-13 16:27 KingK.Pan
0 siblings, 0 replies; 2+ messages in thread
From: KingK.Pan @ 2014-08-13 16:27 UTC (permalink / raw)
To: bitcoin-development
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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?
--
Qing Qing Pan
okcoin.com
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* Re: [Bitcoin-development] What is the danger if bitcoind startted with -flushwallet=false ?
[not found] <tencent_6F055A157BDF0BD41143F75A@qq.com>
@ 2014-08-13 20:29 ` Wladimir
0 siblings, 0 replies; 2+ messages in thread
From: Wladimir @ 2014-08-13 20:29 UTC (permalink / raw)
To: 潘庆庆; +Cc: bitcoin-development
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
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2014-08-13 16:27 [Bitcoin-development] What is the danger if bitcoind startted with -flushwallet=false ? KingK.Pan
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2014-08-13 20:29 ` Wladimir
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