LNAV: no vertical guidance WAAS not required MDA for minimums requires RAIM integrity if WAAS is not available.LPV: vertical guidance WAAS required DA for minimums.LP: no vertical guidance WAAS required MDA for minimums.I made a table for my own reference but since StackExchange doesn't allow tables (AFAIK) here's a summary: Watch multiple files at once, and easily switch between them in real time.There's an FAA paper on RNAV approaches that explains the differences between LP, LPV, LNAV and LNAV/RNAV approaches.Especially useful for fast-moving files, or files that tend to get new lines at random times. Stores all of your presets in real time so you won't ever forget to save your work.Remembers the last preset you applied to each of your log files so that you can make your perfect preset for each file.Remembers your log files so you don't have to keep opening them.Auto-Scroll - If you scroll to the bottom of the log, it will auto-scroll to keep you viewing the latest line, but if you scroll up a bit you can easily move around the file even as lines stream into the bottom of the file (this works just like tail in the terminal).Limited Loading - it uses a golang back-end to efficiently load only the lines that are streaming in (just like tail).Not only will it filter in real-time, it will filter as you are typing out your rule! It also features ordering of your rules, which is useful if you want a grep-like filter (only what matches) or the opposite "everything but this" type of filter. Write regular expressions (or just simple text matches) and define the color and format (bold/italic/underline) you prefer. It also has most of the features on your list including: Here's a screenshot of lnav running in the OS X terminal:Ĭheck out Log Transformer. XML, JSON, or any structured data) so it is easier to read. The Pretty-print view will reformat any log message data (e.g.The timeline view shows a histogram of messages over time.Compressed (gzip and bz2) files are automatically decompressed.Log formats are automatically detected and new log formats can be defined using a JSON file with the appropriate regular expressions.Multiple log files can be loaded at the same time and shown in a single view with messages being sorted by time.In addition to those features, lnav has many others: When viewing other parts of the file, the view is locked to only display those lines, but new lines are still be indexed on the fly. Auto-Scroll - When viewing the bottom of the file, the view is automatically scrolled to show the newest lines.So, in practice, loading extremely large files (multi-GB) does not work well. Large files/Limited Loading - lnav does not load the whole file into memory at any one time, but it does need to read through the whole file at startup to do indexing.Filtering is live, like most things in lnav. Filtering - The :filter-in and :filter-out commands can be used to set filters so that only lines that match a given regular expression are shown or not-shown, respectively.Bookmarked lines can also be copied to the clipboard using the c hotkey. You can then move forward/backward through bookmarks using the u/ U hotkeys. Row Highlighting - You can set bookmarks on lines with the m hotkey.It has most of the features you're interested in, as well as many others: Take a look at lnav, the Logfile Navigator.
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