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{{DISPLAYTITLE:如何运行NodeCore}}<languages/>
See: [[Main_Page]], [[NodeCore_QuickStart]], [[NodeCore_Operations]], [[Nodecore.properties]]

__TOC__

== Overview ==
NodeCore is the service that runs the VBK blockchain. It is written in Java, and runs on Windows, Linux, and Mac.

要查看安装NodeCore的操作指南，请参阅：[[NodeCore_Operations]]

To see a quickstart to get NC running fast, see: [[NodeCore_QuickStart]]

To modify the nodecore.properties file, see: [[Nodecore.properties]]

== 步骤 ==

解开压缩包：

{| class="wikitable"
! Windows
! Mac 和 Linux
|-
| 解压缩nodecore-*.zip文件到bin文件夹中，然后运行nodecore.bat
| 解压缩到首选目录，然后运行nodecore。

注意：在Linux和Mac系统上，您可能需要通过运行以下命令来让nodecore shell脚本可执行：

|}

When you first run NodeCore, it will create several other files in a new mainnet folder (nodecore.properties, veriblock.nodecore.log, nodecore.dat, etc...), and load the existing blockchain.

NodeCore may take several minutes to load all the blocks in the blockchain. See the highest block at https://explore.veriblock.org/network-stats. This shows the number of blocks your local instance must load to be in sync with the chain. NodeCore will create a cache file such that when you restart it they will load faster next time.

== FAQ ==

=== 为什么区块时间的值为负？ ===

时间为负说明矿工的时钟超前了。

有关更多背景信息，请参阅: https://en.bitcoin.it/wiki/Block_timestamp

===如何在升级NodeCore的同时保留钱包===

Since mainnet is now live, updating is very fast.

If you do NOT have a previous wallet/address/balance download the latest nodecore found here https://explore.veriblock.org/api/stats/download.

If you do have a wallet/address/balance that you want to carry over make sure you do the following:

# Make sure you have a backup of your wallet! You can copy the mainnet folder which contains your wallet.dat, or use the [[NodeCore_CommandLine#importwallet]] command from the NC_CLI.
# Ensure that you unzip your newlyl downloaded NodeCore to a new folder location - do not overwrite your previous version
# In the new version:
## Create a mainnet folder most likely in the "nodecore-0.X.X/bin" directory.
## Copy in your previous wallet.dat and walletconfig.dat files into the "nodecore-0.X.X/bin/mainnet" directory.
# Run your new version of nodecore and start to sync.
# When you run NC_CLI getinfo on the new version of the running nodecore, you should see your previous wallet and balance.

=== How to upgrade NodeCore PoW and keep your Bitcoin wallet ===

When upgrading your PoP miner, you can copy the file "bitcoin-pop.wallet" from the bin folder of your current PoP miner directory to the bin folder of your new PoP miner.

===如何为NodeCore指定数据目录===

NodeCore可以将 数据目录 ~d 作为启动参数之一来运行。

Linux系统示例：

<pre>
cd /<myDir>/nodecore-0.1.7/bin
./nodecore -d ~/data/ > /dev/null 2>&1 &

# nodecore.properties will be in ~/data/nodecore.properties
# /mainnet folder will be in ~/data/mainnet
</pre>

Windows系统示例：

<pre>
cd <myDir>\nodecore-0.2.1-r2\bin
nodecore.bat -d C:\data

# nodecore.properties will be in C:\data\nodecore.properties
# /mainnet folder will be in C:\data\mainnet
</pre>

=== How to send from a specific address? ===
https://wiki.veriblock.org/index.php?title=NodeCore_CommandLine#send <br />
<pre>
send <amount> <destinationAddress> [sourceAddress]
</pre>

===How to set NodeCore log level===

Currently NodeCore log level can be set through the NODECORE_LOG_LEVEL process environmental variable. Once set, NodeCore needs to be restarted.

The default is "INFO", which can create very large log files.

This impacts the "veriblock.nodecore.*.log" (which is the biggest log file). It does not affect the other, much smaller, log files.

WINDOWS

This is an example of setting it in Windows, and then starting NodeCore:

<pre>
set NODECORE_LOG_LEVEL=WARN
echo %NODECORE_LOG_LEVEL%
nodecore.bat
</pre>

LINUX

Run in same session, such as a screen:

<pre>
export NODECORE_LOG_LEVEL=WARN
echo $NODECORE_LOG_LEVEL
./nodecore
</pre>

== 故障排除 ==

=== NodeCore同步到某个块时卡住 ===

理想情况下这不太可能会发生。但如果发生了这样的情况，首先应当尝试重新启动NodeCore。

=== Java内存不足 ===

您安装的可能是32位版本的Java。 强烈建议使用64位的Java来避免这个问题。

修改启动文件（windows的nodecore.bat，linux的nodecore）以增加内存限制。 将一个更大的值（例如“1024 MB”）写入DEFAULT_JVM_OPTS变量：

<pre>
DEFAULT_JVM_OPTS=-Xmx1024m
</pre>

=== NodeCore一直显示“应用程序退出”的提示并自动关闭 ===

如果消息像是这样:
<pre>
INFO [main] n.Program [Program.java:133] Application exit
</pre>

这意味着外部的因素正在关闭NodeCore（例如服务器重启，外部进程终止或其他）。

===在mac上遇到问题===

在Mac上，您需要安装JDK（Java开发工具包）而不仅仅是JRE才能运行软件：http://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html

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