<p><code>bitcoind --reindex</code> will be faster because starting over from scratch would not only do all the work <code>bitcoind --reindex</code> is doing, but it'd also have to go out and re-download all those blocks too.</p>

CC BY-SA 3.0
2017-11-20T16:19:42.127Z
2017-11-20T16:19:42.127Z
Eric Allam
<p>I setup a Bitcoin Daemon on a VM hosted on an OpenStack cloud. VM has 8 Cores and 32GB of Ram and 20GB of storage. I mounted a 1TB volume into the .Bitcoin/blocks folder. I started bitcoind and it downloaded about 139GB of the chain. 
I was working on the web stuff when i accidentally restarted the VM.</p>

<pre><code>"error: Could not locate RPC credentials. No authentication cookie could be       
found, and no rpcpassword is set in the configuration file   
(/home/ubuntu/.bitcoin/bitcoin.conf)"

bitcoind -rescan 
: Error loading block database.
</code></pre>

<p>and bitcoind -reindex takes really long time and is still processing. The 138GB are untouched but it looks like --reindex is changing the files in /index.</p>

<p>What will be faster? deleting the 138GB of blockchain and starting bitcoind -daemon all over or bitcoind --reindex</p>

<synchronization><reindex>
Bitcoind --reindex vs starting allover again
benice
# Bitcoind --reindex vs starting allover again

(Asked by: username_0 on 2017-11-20)

I setup a Bitcoin Daemon on a VM hosted on an OpenStack cloud. VM has 8 Cores and 32GB of Ram and 20GB of storage. I mounted a 1TB volume into the .Bitcoin/blocks folder. I started bitcoind and it downloaded about 139GB of the chain. 
I was working on the web stuff when i accidentally restarted the VM.
"error: Could not locate RPC credentials. No authentication cookie could be       
found, and no rpcpassword is set in the configuration file   
(/home/ubuntu/.bitcoin/bitcoin.conf)"

bitcoind -rescan 
: Error loading block database.

and bitcoind -reindex takes really long time and is still processing. The 138GB are untouched but it looks like --reindex is changing the files in /index.
What will be faster? deleting the 138GB of blockchain and starting bitcoind -daemon all over or bitcoind --reindex

**Tags:** synchronization, reindex


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## 1 answers

### Answer by username_1 on 2017-11-20. Score: 3

`bitcoind --reindex` will be faster because starting over from scratch would not only do all the work `bitcoind --reindex` is doing, but it'd also have to go out and re-download all those blocks too.


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