A graph-based distributed in-memory store that leverages efficient graph exploration to provide highly concurrent and low-latency queries over big linked data
Home Page: http://ipads.se.sjtu.edu.cn/projects/wukong
License: Apache License 2.0
I get the following assertion failure: "wukong: /home/jhkim/wukong/core/gstore.hpp:107: ikey_t::ikey_t(sid_t, sid_t, dir_t): Assertion `(vid == v) && (dir == d) && (pid == p)' failed."
I founded that at some moment, pid != p; pid = 86069 and p=1134645. Is it related to NBITS_IDX in core/gstore.hpp and datagen/generate_data.cpp?
I used single machine configuration, and inferenced lubm80 dataset
您好，我按照步骤装好依赖后，没有对连通各个节点，只在自己主机上编译。然后出现了一个问题，显示找不到mpic++这个工具。
The CMAKE_CXX_COMPILER:
/root/ff/wukong/deps/openmpi-1.6.5-install/bin/mpic++
is not a full path to an existing compiler tool.
这是报错原话，我在bin目录下也找不到mpic++这个文件，请问这是怎么回事，求解答
query分发在代码中只体现为根据subject，似乎根据论文还应该有根据predicate和object的分发，是实现时有修改还是我漏看了哪部分代码？烦请指教
你好，我在虚拟机上安装了两台Ubuntu16.04，按照INSTALL.md的步骤安装完成后，运行出现了下面问题，想请教一下。谢谢。
root@server:/code/wukong/scripts# ./run.sh 2
[server:06477] Warning: could not find environment variable "CLASSPATH"
INFO: TOPO: 1nodes
INFO: node 0 cores: 0
INFO: #0: has 1 cores.
INFO: TOPO: 1nodes
INFO: node 0 cores: 0
INFO: #1: has 1 cores.
INFO: #0: allocate 1.04688GB memory
INFO: #1: allocate 1.04688GB memory
[librdma] : listener binding: tcp://:19344
[librdma] : listener binding: tcp://:19344
[librdma] qp: Failed to modify RC to RTR state, No such device or address
[librdma] : recv thread exit!
这个是配置文档
cat config
global_num_proxies 1
global_num_engines 2
global_input_folder /code/wukong/datasets/id_lubm_2
global_data_port_base 5500
global_ctrl_port_base 9576
global_memstore_size_gb 1
global_rdma_buf_size_mb 8
global_rdma_rbf_size_mb 4
global_use_rdma 1
global_rdma_threshold 300
global_mt_threshold 2
global_enable_caching 0
global_enable_workstealing 0
global_silent 0
global_enable_planner 1
global_generate_statistics 1
global_enable_vattr 1
cat mpd.hosts
10.211.55.11
10.211.55.10
cat core.bind
0 1 2
Dear all,
I'm trying to run Wukong with RDMA enabled, but I'm getting this error at loading time:
got bad completion with status: 0xc, vendor syndrome: 0x81, with error transport retry counter exceeded, qp n:0 t:1
It seems that others had this issue:
Answers in issue #5 mention using a new version of libRMDA, but I can't access it. Answers in issue #15 mention changing ports or adding SO_REUSEPORT to setsockopt(), but I tried both and I'm still getting the same error.
Any ideas?
你好，作者。我试图在Ubuntu 20.04上安装Wukong，但我一直遇到以下问题：
-- The C compiler identification is GNU 9.4.0
-- The CXX compiler identification is GNU 9.4.0
-- Check for working C compiler: /usr/bin/cc
-- Check for working C compiler: /usr/bin/cc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Detecting C compile features
-- Detecting C compile features - done
-- Check for working CXX compiler: /usr/bin/c++
-- Check for working CXX compiler: /usr/bin/c++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Found PythonInterp: /usr/bin/python (found version "2.7.18")
-- Looking for pthread.h
-- Looking for pthread.h - found
-- Performing Test CMAKE_HAVE_LIBC_PTHREAD
-- Performing Test CMAKE_HAVE_LIBC_PTHREAD - Failed
-- Looking for pthread_create in pthreads
-- Looking for pthread_create in pthreads - not found
-- Looking for pthread_create in pthread
-- Looking for pthread_create in pthread - found
-- Found Threads: TRUE
-- Configuring done
You have changed variables that require your cache to be deleted.
Configure will be re-run and you may have to reset some variables.
The following variables have changed:
CMAKE_CXX_COMPILER= /usr/bin/c++
CMAKE_CXX_COMPILER= /usr/bin/c++
CMAKE_CXX_COMPILER= /usr/bin/c++
build.sh脚本似乎进入了一个循环，尽管我尝试了多次，结果仍然相同。我已经阅读了你对其他人的建议，并尝试使用最新的仓库进行安装，但我发现安装指南已经过时，缺少了许多依赖项。请问我该如何解决这个bug，或者你有没有更全面的安装指南？非常感谢。
您好，我执行SPARQL查询的时候报错了。我使用的sparql查询是wukong-master/scripts/sparql_query/lubm里面提供的查询语句。数据集的生成也是按照安装教程中的步骤生成的。希望您有空的时候可以回答一下。谢谢！
I am trying to run lubm query on some large lubm datasets. It took large amount of time(several hours) to load large lubm dataset. It would be time-consuming to load it every time I want to try some new queries. Is there a way to export a loaded database into files that I can fastly bulkload them later?
false' failed. [server11:504915] *** Process received signal *** [server11:504915] Signal: Aborted (6) [server11:504915] Signal code: (-6) [server11:504915] [ 0] /lib/x86_64-linux-gnu/libpthread.so.0(+0x153c0) [0x7f4f64c883c0] [server11:504915] [ 1] /lib/x86_64-linux-gnu/libc.so.6(gsignal+0xcb) [0x7f4f64ac518b] [server11:504915] [ 2] /lib/x86_64-linux-gnu/libc.so.6(abort+0x12b) [0x7f4f64aa4859] [server11:504915] [ 3] /lib/x86_64-linux-gnu/libc.so.6(+0x25729) [0x7f4f64aa4729] [server11:504915] [ 4] /lib/x86_64-linux-gnu/libc.so.6(+0x36f36) [0x7f4f64ab5f36] [server11:504915] [ 5] ../build/wukong(+0x113dfb) [0x55af55f15dfb] [server11:504915] [ 6] ../build/wukong(_ZN10BaseLoader13flush_triplesEii+0x1b3) [0x55af55f2db83] [server11:504915] [ 7] ../build/wukong(_ZN10BaseLoader4loadERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEERSt6vectorIS8_I8triple_tSaIS9_EESaISB_EESE_RS8_IS8_I13triple_attr_tSaISF_EESaISH_EE+0x44e) [0x55af55f7152e] [server11:504915] [ 8] ../build/wukong(_ZN6DGraphC2EiP3MemP12StringServerNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE+0x1f3) [0x55af55f5f633] [server11:504915] [ 9] ../build/wukong(main+0x6af) [0x55af55ef7d1f] [server11:504915] [10] /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf3) [0x7f4f64aa60b3] [server11:504915] [11] ../build/wukong(_start+0x2e) [0x55af55efaade] [server11:504915] *** End of error message *** got bad completion with status: 0xc, vendor syndrome: 0x81, with error transport retry counter exceeded, qp n:0 t:0 wukong: /home/robert/wukong/rdma_lib/rdmaio.hpp:769: rdmaio::Qp::IOStatus rdmaio::Qp::poll_completion(uint64_t*): Assertion false' failed.您好！我在编译wukong的时候遇到了问题。因为我的服务器不支持rdma，所以我使用./build.sh -DUSE_RDMA=OFF命令编译。但是出现了以下的问题。麻烦您有空解答一下。谢谢！
root@node6:/usr/data/pikachu_test/app_install_by_src/wukong-master/scripts# ./build.sh -DUSE_RDMA=OFF
options: -DUSE_RDMA=OFF
-- The C compiler identification is GNU 4.8.5
-- The CXX compiler identification is GNU 4.8.5
-- Check for working C compiler: /usr/bin/cc
-- Check for working C compiler: /usr/bin/cc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Detecting C compile features
-- Detecting C compile features - done
-- Check for working CXX compiler: /usr/bin/c++
-- Check for working CXX compiler: /usr/bin/c++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Configuring done
-- Generating done
-- Build files have been written to: /usr/data/pikachu_test/app_install_by_src/wukong-master/build
Scanning dependencies of target wukong
[ 50%] Building CXX object CMakeFiles/wukong.dir/core/wukong.cpp.o
[100%] Linking CXX executable wukong
/usr/bin/ld: cannot find -libverbs
collect2: error: ld returned 1 exit status
CMakeFiles/wukong.dir/build.make:97: recipe for target 'wukong' failed
make[2]: *** [wukong] Error 1
CMakeFiles/Makefile2:67: recipe for target 'CMakeFiles/wukong.dir/all' failed
make[1]: *** [CMakeFiles/wukong.dir/all] Error 2
Makefile:83: recipe for target 'all' failed
make: *** [all] Error 2
use a docker to simplfy deployment
Wukong+G, the paper titled "Fast and Concurrent RDF Queries using RDMA-assisted GPU Graph Exploration".
您好，我在使用wukong测试例子：tests/gpu/test-adaptor.cpp的时候。
如果使用GPU，会在RDMA_init函数里边停止运行，报错为Connect Device Memory Region failed at dev 0, err Bad address；
如果不使用GPU，将代码改为纯CPU的话，则会在send函数报错，got bad completion with status: 0xc, vendor syndrome: 0x81, with error transport retry counter exceeded, qp n:2 t:0；
特别是第二个问题，网上信息较少，请问应该如何解决？
十分感谢！望回复。
你好！请问wukong是使用什么来存储rdf数据的？
您好，我是一名高校研究生，在安装wukong的时候，发现deps里缺少文件librdma-1.0.0.tar.gz
您好， 我看到wukong里面有DynamicGStore, 这个提供的功能是不是支持图关系的动态更新啊？
在proxy.hpp中run_single_query函数最后几行，代码段为
send_request(request);
reply = recv_reply();
第一条代码实际执行了将分解后的查询分发到各个对应的节点，第二条代码是各个节点监听是否收到消息，如果收到消息且是查询，就把查询赋值给reply。然后这个函数最后参数中的reply对应的是最后一次字查询的reply。
但是并没有找到实际执行查询的过程，即从vector中查找符合要求的项。
想知道wukong系统中实际执行查询是在哪一部分？
另外wukong底层存储spo或者ops是按照三元组有序存储的，基于主语或者宾语的查询是否是采用类似于的快速搜索这种搜索算法？
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