Error: [NVM MGR] failed to open nvm file

[polar1shu]

When I ran this project, I found the project report the error. I use the root account, and run sh ycsb.sh.

Caused by:
process didn't exit successfully: /home/xx/Falcon/target/release/deps/n2db-d18d0518254f145d ycsb_test_sync --nocapture (exit status: 255)

[jzc15]

There are 3 NVM files here, NBTree, Dash and Falcon, which NVM file can not open and is the path correct?

[polar1shu]

After I run ycsb.sh with root, it shows:
running 1 test
creating a new pool
pool opened at: 0x5f0000000000
/mnt/pmem0/pmem_btree.data
[NVM MGR] failed to open nvm file
error: test failed, to rerun pass --lib

The path is correct since it has the pmem_hash.data file.

[jzc15]

It seems to be a problem with NBTree. It may be necessary to create the file in advance.

I don't have an experimental environment at the moment and I'll try it later. You can use "printf("errno=%d\n",errno);" on NBTree/tree/src/btree.cpp line 52 for more detail

[polar1shu]

When I create the file in advance, I can open the file. However, I still run this project. Seems to be a problem with NBtree.
The problem is following:
thread 'main' panicked at 'called Result::unwrap() on an Err value: IO(Os { code: 21, kind: IsADirectory, message: "Is a directory" })', src/storage/nvm_file.rs:96:62
stack backtrace:
0: rust_begin_unwind
at /rustc/d9c13cd4531649c2028a8384cb4d4e54f985380e/library/std/src/panicking.rs:593:5
1: core::panicking::panic_fmt
at /rustc/d9c13cd4531649c2028a8384cb4d4e54f985380e/library/core/src/panicking.rs:67:14
2: core::result::unwrap_failed
at /rustc/d9c13cd4531649c2028a8384cb4d4e54f985380e/library/core/src/result.rs:1651:5
3: core::result::Result<T,E>::unwrap
at /rustc/d9c13cd4531649c2028a8384cb4d4e54f985380e/library/core/src/result.rs:1076:23
4: n2db::storage::nvm_file::NVMTableStorage::init_test_database
at ./src/storage/nvm_file.rs:96:27
5: n2db::test_nbtree
at ./src/main.rs:58:5
6: n2db::main
at ./src/main.rs:120:5
7: core::ops::function::FnOnce::call_once
at /rustc/d9c13cd4531649c2028a8384cb4d4e54f985380e/library/core/src/ops/function.rs:250:5
note: Some details are omitted, run with RUST_BACKTRACE=full for a verbose backtrace.

[jzc15]

It reports that "Is a directory". Is the path on src/customer_config.rs(line3) is a directory? It should be the path of a file in NVM

[polar1shu]

I run this project successfully. This is a very good project and worthwhile for people on the topic of OLTP transactions on NVM.
I suggest you modify README.md to make it easier for the programmer behind you to run it directly. The subprojects of a project cannot be downloaded automatically via git pull --recurse-submodules. The pmem_btree.data file needs to be created manually. The other can be created automatically.

Thank you.