IBM to Represent Redli

Redli is a new command line interface for Redis database 
27 August 2018   2020

IBM Compose, which develops a secure cloud environment for various databases, introduced the open source Redli command-line interface (CLI) to the non-relational high-performance Redis DBMS. A special feature of the client is a convenient connection to servers protected by TLS / SSL security protocols.

The developers argue that working with secure Redis servers using the default command-line client, redis-cli, is a nuisance. For each connection, you need to configure the Stunnel utility, which provides a secure connection, send the server to the local port and, finally, connect to this port using redis-cli.

Authors of Redli tried to solve the problem using the script stunredis for automated tuning of tunnels on demand, but it did not always work correctly.

IBM specialists wrote a CLI client in the Go programming language using the Redigo command line flags, the interactive library, and JSON from the Redis documentation. Among the key features of Redli there are:

  • rediss schemes in unified resource identifiers (URIs) to fully specify a connection to the Redis database;
  • --tls flag for activation of TLS / SSL protocols, as well as-h, -p and -a, which are similar to those in redis-cli;
  • the --long flag indicating the full server name and port in the string;
  • help with help on each command;
  • completion of the tab for commands;
  • history of each session;
  • All the Redis supported teams, including the future ones;
  • immediate execution of operations Redis, written immediately after the command Redli.

According to the developers, due to the principles of the interface, it does not yet support the special flags of debugging and reports --stat,--latency and --bigkeys. This will be fixed in future updates.

In February 2017, due to problems with Redis clusters, the version control system GitLab failed for half an hour after an unsuccessful update attempt.

LLVM 10.0.0 to be Released

New version of the popular development toolkit brings, among other things, support for the C++ Concepts
26 March 2020   955

After six months of development, the release of the LLVM 10.0 project, a GCC-compatible toolkit (compilers, optimizers, and code generators), compiling programs into an intermediate bitcode of RISC-like virtual instructions (a low-level virtual machine with a multi-level optimization system), is presented. The generated pseudo-code can be converted using the JIT compiler into machine instructions directly at the time of program execution.

Among the new features of LLVM 10.0, there are support for C ++ Concepts (C ++ Concepts), termination of the launch of Clang in the form of a separate process, support for CFG checks (control flow guard) for Windows, and support for new CPU features.

The main innovations of LLVM 10.0:

  • New interprocedural optimizations and analyzers have been added to the Attributor framework. The prediction of the state of 19 different attributes, including 12 attributes of 12 LLVM IR and 7 abstract attributes such as liveness, is provided.
  • New built-in compiler matrix mathematical functions (Intrinsics) have been added, which, when compiled, are replaced by effective vector instructions.
  • Numerous improvements to the backends for the X86, AArch64, ARM, SystemZ, MIPS, AMDGPU, and PowerPC architectures. Added support for Cortex-A65, Cortex-A65AE, Neoverse E1 and Neoverse N1 CPUs. For ARMv8.1-M, ​​the code generation process has been optimized (for example, support for loops with minimal overhead has appeared) and support for auto-vectorization using the MVE extension has been added. Improved support for CPU MIPS Octeon. PowerPC includes vectorization of mathematical routines using the MASSV (Mathematical Acceleration SubSystem) library, improved code generation, and optimized memory access from loops. For x86, the processing of vector types v2i32, v4i16, v2i16, v8i8, v4i8 and v2i8 has been changed.
  • Improved code generator for WebAssembly. Added support for TLS (Thread-Local Storage) and atomic.fence instructions. Significantly expanded support for SIMD. WebAssembly object files added the ability to use function signatures with multiple values.
  • When processing cycles, the MemorySSA analyzer is used to determine the dependencies between different memory operations. MemorySSA can reduce compilation and execution time, or can be used instead of AliasSetTracker without sacrificing performance.
  • The LLDB debugger has significantly improved support for the DWARF v5 format. Improved build support with MinGW and added the initial ability to debug Windows executable files for ARM and ARM64 architectures. Added descriptions of options offered when autocompleting input by pressing tabs.
  • Enhanced LLD Linker Features. Improved support for the ELF format, including full compatibility of glob templates with the GNU linker, added support for the compressed debug sections ".zdebug", added the PT_GNU_PROPERTY property to determine the section (can be used in future Linux kernels), implemented modes "-z noseparate-code", "-z separate-code" and "-z separate-loadable-segments". Improved support for MinGW and WebAssembly.

Get more at the release notes.