How to insert KV pairs into an empty APEX

[lixiao-c]

Hi,
I try to skip the bulk load and insert some KV pairs into an empty index, but the program seems to enter an endless loop.
The modifications are as follows.

1. I set the "skip_bulkload“ in src/benchmark/main.cpp to true
2. I run the "run.sh" with single thread
3. the benchmark gets stuck after printing some information. The CPU utilization is 100%.

found flag keys_file = longitudes-200M.bin.data
found flag keys_file_type = binary
found flag keys_type = double
found flag init_num_keys = 0
found flag workload_keys = 10000
found flag total_num_keys = 10000
found flag operation = insert
found flag insert_frac = 0
found flag lookup_distribution = uniform
found flag theta = 0.99
found flag using_epoch = 1
found flag thread_num = 1
found flag index = apex
found flag random_shuffle
found flag sort_bulkload = 1
The key type is double
The epoch is used
creating a new pool
pool opened at: 0x7f4480000000
Intial allocator: 1
Recover/Initialize time (ms) = 162.361

I try to insert data to an empty ALEX and it works.

Hope the author could fix the problem. Thanks a lot!

[webbrain-one]

Thanks for the detailed report! I’ve opened a pull request (#9) to address this. It fixes the hang/infinite loop that can occur when inserting key-value pairs into an empty APEX index, especially when using skip_bulkload and a single-threaded benchmark.