kraret / terichdb Goto Github PK

Are there any plans to publish sources of dfadb core under some some permissive license (e.g. MIT)? If yes, what is the ETA?

I'm asking, because I'm working on a mid-size fully open-source project, which would leverage the compelling features of terark db, but only in case it's fully open source.

suprise about another project: https://github.com/baidu/tera

cannot download from http://www.terark.com/zh/download

seems like it's just a piece of code snippet

which is included by 'src/terark/db/db_segment.cpp'.

Building steps (On Ubuntu 14.04, with GCC 4.8.4):

WORK_DIR=/path/to/work/dir
mkdir -p $WORK_DIR
cd $WORK_DIR

# install boost-1.60.0
wget https://github.com/boostorg/boost/archive/boost-1.60.0.tar.gz
tar xfz boost-1.60.0.tar.gz
cd boost-boost-1.60.0
./bootstrap.sh --prefix=`pwd`/output --with-libraries=system,filesystem,date_time
./b2
./b2 install
cd ..

# install tbb-4.4
wget https://www.threadingbuildingblocks.org/sites/default/files/software_releases/source/tbb44_20160128oss_src_0.tgz
tar xfz tbb44_20160128oss_src_0.tgz
cd tbb44_20160128oss
make -j8
cd ..

# install wiredtiger-2.7.0
wget https://github.com/wiredtiger/wiredtiger/releases/download/2.7.0/wiredtiger-2.7.0.tar.bz2
tar xfj wiredtiger-2.7.0.tar.bz2
cd wiredtiger-2.7.0
sh autogen.sh
./configure --prefix=`pwd`/output
make -j8
make install
cd ..

# build terark-db
# firstly, add the following two lines to the head of 'terark-db/Makefile'
#   INCS := -I$WORK_DIR/tbb44_20160128oss/include -I$WORK_DIR/wiredtiger-2.7.0/output/include
#   LIBS := -L$WORK_DIR/tbb44_20160128oss/build/linux_intel64_gcc_cc4.8_libc2.19_kernel3.13.0_release -L$WORK_DIR/wiredtiger-2.7.0/output/lib
#
export BOOST_INC=$WORK_DIR/boost_1_60_0/output/include
make

i spend all the day to try install them on debian wheezy & jessie, but failed
i saw your offical website said in 0.13.9 have resolved this problem
but where is it?
thx

We'll response ASAP.

[root@server37 table1]# terark-db-schema-compile.exe dbmeta.json DbTest RowData
非法指令 (core dumped)

export LD_LIBRARY_PATH=/opt/glibc-2.14/lib:$LD_LIBRARY_PATH
[root@server37 table1]# g++ --version
g++ (GCC) 4.8.1
Copyright (C) 2013 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

[root@server37 table1]# gcc --version
gcc (GCC) 4.8.1
Copyright (C) 2013 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

I was unable to find any notion of licensing neither in documentation nor in source code nor any license file in the repository. Could you please clearly state under which license is the source code?

terak::db::ZipIntStore::zipValues takes a const void* argument, and later then static cast it to const Int*. So maybe we can just modify the signature a little bit for better readability.
Before:

template<class Int>
void ZipIntStore::zipValues(const void* , size_t)

After:

template<class Int>
void ZipIntStore::zipValues(const Int* , size_t)

I've walked through the benchmarks and asked me one question - how is this DB fault tolerant? Does it use just mmap with populate? Concurrent writes to mmaped space do not provide any guarantees. And how about long writes (e.g. when the data to be written are huge - hundreds of MB)?

您好！Terichdb的技术非常值得期待。我这里有几个问题，不知道您是否能够回答一下。

1. 在Terichdb中，key与value是使用不同的压缩技术进行存储的，key是使用nlt_build，value是使用zbs_build？
2. 我看文中提到了与RocksDB的对比，对比的过程中，Terichdb是在full compact之后测试的QPS，是否有在读写混合的场景下，TerakDB的QPS的变化情况？

我最近也在研究一些关于succinct的技术，持续关注与研究中！！！

I would like to point out that identifiers like "__penglei_valvec_hpp__" and "__terark_db_table_store_hpp__" do eventually not fit to the expected naming convention of the C++ language standard.
Would you like to adjust your selection for unique names?