Package lmdb-0.9.29 was installed; and py-lmdb, as a --user install, from PyPi
so lmdb can be used from Python3.9.
Behaviour seemed erratic, including segmentation faults, but for a while it
seemed possible to avoid these by using alternative methods supported by
py-lmdb.
Eventually I got stuck and downloaded the project from
github.com/jnwatson/py-lmdb/ to try running the address-book example and modify
it toward something like the problem case at which I was stuck.
Running got a segmentation fault immediately but repeated retries after
deleting the *.sem siblings of /tmp/address-book.lmdb got to a case where the
run did not give a segmentation fault.
The first script below shows this and includes a list of installed packages and
dmesg output.
The second script below is from an equivalent FreeBSD session and shows the
address-book example giving the expected output.
I was assuming py-lmdb should just work, but notice FreeBSD has a port but not
OpenBSD: so maybe assumption is wrong?
Script started on Sat Jan 28 12:59:27 2023
opendev$ uname -a
OpenBSD opendev.home 7.2 GENERIC.MP#758 amd64
opendev$ ls /tmp
sndio vi.recover
opendev$ python3.9 py-lmdb-py-lmdb_1.4.0/examples/address-book.py
Segmentation fault (core dumped)
opendev$ ls /y tmp
2192baec8c73f403a857cb5e31a384a8481d96ab965510ec63ad71da9798c522.sem
address-book.lmdb
eebfd9cc55a9dc2ab5b13550e78544804307f93944815b7760405d5dfeac1b0f.sem
sndio
vi.recover
opendev$ python3.9 py-lmdb-py-lmdb_1.4.0/examples/address-book.py
Segmentation fault (core dumped)
opendev$ ls /tmp/*.sem
/tmp/2192baec8c73f403a857cb5e31a384a8481d96ab965510ec63ad71da9798c522.sem
/tmp/eebfd9cc55a9dc2ab5b13550e78544804307f93944815b7760405d5dfeac1b0f.sem
opendev$
opendev$ ls /tmp/*.sem /tmp/*.sem /tmp/*.sem
r /tmp/*.semm /tmp/*.sem
opendev$
opendev$ rm /tmp/*.sem
opendev$ ls /tmp/*.sem
opendev$ python3.9 py-lmdb-py-lmdb_1.4.0/examples/address-book.py
DB: home
DB: business
Updating number for dentist
Segmentation fault (core dumped)
opendev$
opendev$ python3.9 py-lmdb-py-lmdb_1.4.0/examples/address-book.py
opendev$ rm /tmp/*.sem
opendev$
opendev$ rm /tmp/*.sem
opendev$ python3.9 py-lmdb-py-lmdb_1.4.0/examples/address-book.py
DB: home
DB: business
Updating number for dentist
Deleting number for hospital
Home DB is now:
b'dentist' b'099991231'
Boss telephone number: b'0123151232'
Deleting all numbers from business DB:
Adding number for recruiter to business DB
Business DB is now:
b'recruiter' b'04123125324'
opendev$ ls /tmp
address-book.lmdb sndio vi.recover
opendev$
opendev$
opendev$ ls /tmp
opendev$ python3.9 py-lmdb-py-lmdb_1.4.0/examples/address-book.py
DB: home
b'recruiter' b'04123125324'
DB: business
Updating number for dentist
Deleting number for hospital
Home DB is now:
b'dentist' b'099991231'
b'recruiter' b'04123125324'
Boss telephone number: None
Deleting all numbers from business DB:
Adding number for recruiter to business DB
Business DB is now:
b'recruiter' b'04123125324'
opendev$
opendev$ python3.9 py-lmdb-py-lmdb_1.4.0/examples/address-book.py
opendev$ ls /tmp
address-book.lmdb sndio vi.recover
opendev$
opendev$ cat py-lmdb-py-lmdb_1.4.0/examples/address-book.py
import lmdb
# Open (and create if necessary) our database environment. Must specify
# max_dbs=... since we're opening subdbs.
env = lmdb.open('/tmp/address-book.lmdb', max_dbs=10)
# Now create subdbs for home and business addresses.
home_db = env.open_db(b'home')
business_db = env.open_db(b'business')
# Add some telephone numbers to each DB:
with env.begin(write=True) as txn:
txn.put(b'mum', b'012345678', db=home_db)
txn.put(b'dad', b'011232211', db=home_db)
txn.put(b'dentist', b'044415121', db=home_db)
txn.put(b'hospital', b'078126321', db=home_db)
txn.put(b'vendor', b'0917465628', db=business_db)
txn.put(b'customer', b'0553211232', db=business_db)
txn.put(b'coworker', b'0147652935', db=business_db)
txn.put(b'boss', b'0123151232', db=business_db)
txn.put(b'manager', b'0644810485', db=business_db)
# Iterate each DB to show the keys are sorted:
with env.begin() as txn:
for name, db in ('home', home_db), ('business', business_db):
print('DB:', name)
for key, value in txn.cursor(db=db):
print(' ', key, value)
print()
# Now let's update some phone numbers. We can specify the default subdb when
# starting the transaction, rather than pass it in every time:
with env.begin(write=True, db=home_db) as txn:
print('Updating number for dentist')
txn.put(b'dentist', b'099991231')
print('Deleting number for hospital')
txn.delete(b'hospital')
print()
print('Home DB is now:')
for key, value in txn.cursor():
print(' ', key, value)
print()
# Now let's look up a number in the business DB
with env.begin(db=business_db) as txn:
print('Boss telephone number:', txn.get(b'boss'))
print()
# We got fired, time to delete all keys from the business DB.
with env.begin(write=True) as txn:
print('Deleting all numbers from business DB:')
txn.drop(business_db, delete=False)
print('Adding number for recruiter to business DB')
txn.put(b'recruiter', b'04123125324', db=business_db)
print('Business DB is now:')
for key, value in txn.cursor(db=business_db):
print(' ', key, value)
print()
opendev$
opendev$
opendev$ ls py-lmdb-py-lmdb_1.4.0/examples
address-book.py dirtybench.py nastybench.py words.gz
dirtybench-gdbm.py keystore parabench.py
opendev$
opendev$ ls py-lmdb-py-lmdb_1.4.0
ChangeLog MANIFEST.in docs lib misc tests
LICENSE README.md examples lmdb setup.py
opendev$
opendev$
opendev$ pkg_info lmdb
Information for inst:lmdb-0.9.29
Comment:
Symas Lightning Memory-Mapped Database
Description:
LMDB is an ultra-fast, ultra-compact key-value data store developed by Symas
for the OpenLDAP Project.
It uses memory-mapped files, so it has the read performance of a pure in-memory
database while still offering the persistence of standard disk-based databases,
and is only limited to the size of the virtual address space, (it is not
limited to the size of physical RAM). LMDB was originally called MDB, but was
renamed to avoid confusion with other software associated with the name MDB.
Maintainer: Jeremie Courreges-Anglas <j...@wxcvbn.org>
WWW: https://symas.com/lmdb/
opendev$
opendev$
opendev$ pkg_info
adwaita-icon-theme-42.0 base icon theme for GNOME
antiword-0.37p0 converts MSWord Documents to ASCII Text and PostScript
apl-fonts-1.0p0 Adrian Smith's standard APL fonts
apr-1.7.0 Apache Portable Runtime
apr-util-1.6.1p4 companion library to APR
aspell-0.60.6.1p11 spell checker designed to eventually replace Ispell
at-spi2-atk-2.38.0 atk-bridge for at-spi2
at-spi2-core-2.44.1 service interface for assistive technologies
atk-2.38.0 accessibility toolkit used by gtk+
autoconf-2.71 automatically configure source code on many Un*x platforms
avahi-glib-0.8p1 GLib and GObject integration libraries for avahi
avahi-libs-0.8p2 libraries and common data files for avahi
boost-1.80.0p0v0 free peer-reviewed portable C++ source libraries
brotli-1.0.9p0 generic lossless compressor
bzip2-1.0.8p0 block-sorting file compressor, unencumbered
cairo-1.17.6 vector graphics library
cdparanoia-3.a9.8p4 CDDA reading utility with extra data verification features
cdrtools-3.00p2 ISO 9660 filesystem and CD/DVD/BD creation tools
chromium-105.0.5195.125 Chromium browser
claws-mail-4.1.0 mail and news client
claws-mail-pdfviewer-4.1.0 pdfviewer plugin
clucene-core-2.3.3.4p3 full-text search engine library
cups-libs-2.4.2 CUPS libraries and headers
curl-7.87.0 transfer files with FTP, HTTP, HTTPS, etc.
cvsps-2.1p2 generate patchsets from CVS repositories
cyrus-sasl-2.1.28 RFC 2222 SASL (Simple Authentication and Security Layer)
db-4.6.21p7v0 Berkeley DB package, revision 4
db-tcl-4.6.21p4v0 TCL bindings for Berkeley DB, revision 4
dbus-1.14.0p0v0 message bus system
dbus-daemon-launch-helper-1.14.0 DBus setuid helper for starting system services
dbus-glib-0.112p0v0 glib bindings for dbus message system
dconf-0.40.0 configuration backend system
desktop-file-utils-0.26 utilities for dot.desktop entries
dvd+rw-tools-7.1p1 mastering tools for DVD+RW/+R/-R/-RW
e2fsprogs-1.46.2p0 utilities to manipulate ext2 filesystems
ee-1.5.2p2v0 easy to use text editor
enchant-1.6.1p3 generic spell checking library
enchant2-2.3.3 generic spell checking library
evince-42.3-light GNOME document viewer
flac-1.3.4p0 free lossless audio codec
fribidi-1.0.12 library implementing the Unicode Bidirectional Algorithm
gcr-3.41.1 library for bits of crypto UI and parsing
gdbm-1.23 GNU dbm
gdk-pixbuf-2.42.9p0 image data transformation library
geoclue2-2.6.0p2 modular geoinformation service on top of D-Bus
gettext-runtime-0.21p1 GNU gettext runtime libraries and programs
ghostscript-9.56.1 PostScript and PDF interpreter
ghostscript-fonts-8.11p3 35 standard PostScript fonts with Adobe name aliases
giflib-5.2.1 tools and library routines for working with GIF images
git-2.37.3 distributed version control system
glew-2.2.0 GL Extension Wrangler library
glib2-2.72.4p2 general-purpose utility library
glib2-networking-2.72.2 network-related gio modules for GLib
glm-0.9.8.5 C++ mathematics header-only library for OpenGL software
gmake-4.3 GNU make
gmp-6.2.1p0 library for arbitrary precision arithmetic
gnuchess-6.2.9 chess program
gnumeric-1.12.53 spreadsheet application for GNOME
gnupg-2.2.39 GNU privacy guard - a free PGP replacement
gnutls-3.7.7 GNU Transport Layer Security library
goffice-0.10.53 document centric objects and utilities
gpgme-1.18.0 GnuPG Made Easy
graphene-1.10.8 thin layer of graphic data types
graphite2-1.3.14 rendering for complex writing systems
gsettings-desktop-schemas-42.0 collection of shared GSettings schemas
gspell-1.10.0 spell-checking library for GTK+
gstreamer1-1.20.3 framework for streaming media
gstreamer1-plugins-base-1.20.3 base elements for GStreamer
gstreamer1-plugins-good-1.20.3p0 good elements for GStreamer
gtk+3-3.24.34 multi-platform graphical toolkit
gtk+3-cups-3.24.34p0 gtk+3 CUPS print backend
gtk-update-icon-cache-3.24.34 gtk+ icon theme caching utility
gumbo-0.10.1p0 HTML5 parsing library in pure C99
gvfs-1.50.2 GNOME Virtual File System
harfbuzz-5.2.0 text shaping library
harfbuzz-icu-5.2.0 ICU support for libharfbuzz
hicolor-icon-theme-0.17 fallback theme of the icon theme specification
hubbub-0.3.7 HTML parser
hunspell-1.7.0 spelling, stemming, morphological analysis and generation
hyphen-2.8.8 text hyphenation library
icu4c-71.1v0 International Components for Unicode
ijs-0.35p3 raster image transmission library
intel-firmware-20220809v0 microcode update binaries for Intel CPUs
inteldrm-firmware-20220913 firmware binary images for inteldrm(4) driver
iso-codes-4.11.0 lists of the country, language and currency iso names
itcl-3.4.1p2v0 object-oriented extensions to Tcl
itk-3.3p5 build mega-widgets using the Itcl object system
jbig2dec-0.19 decoder for JBIG2 monochrome hi-res image compression format
jpeg-2.1.3v0 SIMD-accelerated JPEG codec replacement of libjpeg
json-glib-1.6.6p0 JSON parser for GLib-based libraries and applications
lame-3.100p1 lame ain't an MP3 encoder
lcms2-2.12 color management library
libarchive-3.6.1p0 multi-format archive and compression library
libassuan-2.5.5 IPC library used by GnuPG and gpgme
libb2-0.98.1v0 library providing BLAKE2b, BLAKE2s, BLAKE2bp, BLAKE2sp
libcanberra-0.30p4 implementation of the Freedesktop sound theme spec.
libcanberra-gtk3-0.30p9 gtk+3 helper for libcanberra
libcss-0.9.1 CSS parser and selection engine
libdom-0.4.1 W3C DOM implementation
libetpan-1.9.4 mail purpose library
libevent-2.1.12 event notification library
libexif-0.6.24 extract digital camera info tags from JPEG images
libffi-3.4.2 Foreign Function Interface
libgcrypt-1.10.1p0 crypto library based on code used in GnuPG
libgpg-error-1.45 error codes for GnuPG related software
libgsf-1.14.50 GNOME Structured File library
libhandy-1.8.0 building blocks for modern adaptive GNOME apps
libical-3.0.14 implementation of the iCalendar protocols and data units
libiconv-1.17 character set conversion library
libidn-1.41 internationalized string handling
libidn2-2.3.0p0 implementation of IDNA2008 internationalized domain names
libksba-1.6.3 X.509 library
libltdl-2.4.2p2 GNU libtool system independent dlopen wrapper
libnettle-3.8.1 cryptographic library
libnotify-0.8.1 send desktop notifications to a notification daemon
libnsbmp-0.1.6 BMP/ICO decoding library
libnsgif-0.2.1p0 GIF decoding library
libnslog-0.1.3 netsurf logging library
libnspsl-0.1.6 public suffix list library for netsurf
libnsutils-0.1.0 miscellaneous internal functions for netsurf
libogg-1.3.5 Ogg bitstream library
libpaper-1.1.28 library for handling paper characteristics
libparserutils-0.2.4p0 utility library for parser building
libproxy-0.4.18p1 library handling all the details of proxy configuration
libpsl-0.21.1 public suffix list library
libreoffice-7.4.1.2v0 multi-platform productivity suite
librsvg-2.54.5 SAX-based render library for SVG files
libsecret-0.20.5p0 library for storing and retrieving passwords and secrets
libshout-2.4.5 library for communicating with an icecast server
libsndfile-1.1.0 library to handle various audio file formats
libsoup-2.74.2 HTTP client/server library for GNOME
libsoup3-3.2.0 HTTP client/server library for GNOME
libspectre-0.2.10p1 library for rendering Postscript documents
libtasn1-4.19.0 Abstract Syntax Notation One structure parser library
libtheora-1.2.20190601p0 open video codec
libunbound-1.16.3 validating DNS resolver library
libunistring-0.9.7 manipulate Unicode strings
libusb1-1.0.23p2 library for USB device access from userspace
libutf8proc-2.4.0p0 unicode library
libv4l-1.20.0p2 libv4l userspace library
libvorbis-1.3.7 audio compression codec library
libvpx-1.11.0p1v0 Google VP8/VP9 video codec
libwapcaplet-0.4.3 string internment library
libwebp-1.2.4 Google WebP image format conversion tool
libxkbcommon-1.4.1 library to handle keyboard descriptions
libxml-2.10.3 XML parsing library
libxslt-1.1.37 XSLT C Library for GNOME
libyajl-2.1.0 small JSON library written in ANSI C
lmdb-0.9.29 Symas Lightning Memory-Mapped Database
lz4-1.9.4 fast BSD-licensed data compression
lzo2-2.10p2 portable speedy lossless data compression library
mariadb-client-10.9.3v1 multithreaded SQL database (client)
metaauto-1.0p4 wrapper for gnu auto*
motif-2.3.8 Motif toolkit
mozilla-dicts-en-GB-1.3p1 en-GB dictionary for Mozilla
mpfr-4.1.0 library for multiple-precision floating-point computations
mpg123-1.30.1 fast console MPEG audio player and decoder library
netsurf-3.10p3 lightweight web browser, with GTK interface
nghttp2-1.49.0 library for HTTP/2
noto-emoji-20211101 emoji fonts for the noto font family
noto-fonts-20201206 pan-unicode font family
npth-1.6 new GNU Portable Threads Library
nspr-4.35 Netscape Portable Runtime
nss-3.83 libraries to support development of security-enabled apps
openh264-2.3.0 Cisco implementation of H.264 codec
openjp2-2.5.0 open-source JPEG 2000 codec library
openldap-client-2.6.3p0v0 LDAP client library and tools
opus-1.3.1 IETF audio codec
orc-0.4.32 library and toolset to operate arrays of data
p11-kit-0.24.1 library for loading and enumerating PKCS#11 modules
p5-Error-0.17029 error/exception handling in an OO-ish way
p5-Mail-Tools-2.21p0 modules for handling mail with perl
p5-Time-TimeDate-2.33 library for parsing and formatting dates and times
pango-1.50.10 library for layout and rendering of text
pcre-8.44 perl-compatible regular expression library
pinentry-1.2.1 PIN or passphrase entry dialog (ncurses interface)
png-1.6.37p0 library for manipulating PNG images
poppler-21.12.0p0 PDF rendering library
poppler-data-0.4.11 encoding files for poppler
poppler-utils-21.12.0 PDF conversion tools and utilities
postgresql-client-14.5 PostgreSQL RDBMS (client)
py3-MarkupSafe-2.1.1 implements an XML/HTML/XHTML markup safe string
py3-alabaster-0.7.12p0 configurable sidebar-enabled Sphinx theme
py3-apsw-3.35.4p0 thin SQLite wrapper for Python
py3-babel-2.10.3 I18N/L10N tools for Python
py3-brotli-1.0.9p2 Python bindings for the Brotli compression library
py3-bsddb3-6.0.1p6 Python bindings for Oracle Berkeley DB
py3-certifi-2021.10.8p0 Python package to check certificates using the OpenBSD
CA
py3-chardet-4.0.0p3 character encoding auto-detection in Python
py3-charset-normalizer-2.0.12 character set detector library
py3-cython-0.29.32v0 optimising static compiler for Python and Cython
py3-docutils-0.19 process plaintext documentation into other formats
py3-idna-3.3 Python library to support the IDNA protocol
py3-imagesize-1.4.1 getting image size from png/jpeg/jpeg2000/gif file
py3-importlib_metadata-4.12.0 library providing an API for accessing packages
metadata
py3-jinja2-3.1.2 fast, optionally sandboxed, Python template engine
py3-packaging-21.3 core utilities for Python packages
py3-parsing-3.0.9p0 Python parsing module
py3-pip-22.2.2 tool for installing Python packages
py3-psutil-5.8.0p0 library to retrieve system information and utilisation
py3-pygments-2.13.0 Python syntax highlighter
py3-requests-2.28.1 elegant and simple HTTP library for Python
py3-setuptools-64.0.3v0 simplified packaging system for Python modules
py3-snowballstemmer-2.2.0 snowball stemming library collection for Python
py3-sphinx-5.1.1 Python documentation generator
py3-sphinxcontrib-applehelp-1.0.2p0 sphinx extension to output Apple help books
py3-sphinxcontrib-devhelp-1.0.2p0 sphinx extension to output Devhelp documents
py3-sphinxcontrib-htmlhelp-2.0.0 sphinx extension to output HTML help files
py3-sphinxcontrib-jsmath-1.0.1p0 sphinx extension to render display math in HTML
py3-sphinxcontrib-qthelp-1.0.3p0 sphinx extension to output QtHelp documents
py3-sphinxcontrib-serializinghtml-1.1.5 sphinx extension to output serialized
HTML (json and pickle)
py3-sphinxcontrib-websupport-1.2.4p0 integrate Sphinx documentation into your
Web application
py3-stemmer-2.0.1 snowball stemming algorithms, for information retrieval
py3-tz-2022.2.1 Python API for dealing with timezones
py3-urllib3-1.26.12 HTTP library for Python
py3-wheel-0.37.1 built-package format for Python
py3-zipp-3.5.0p0 backport of pathlib-compatible object wrapper for zip files
python-3.10.9p0 interpreted object-oriented programming language
python-3.9.16 interpreted object-oriented programming language
python-idle-3.10.9 IDE for Python
python-idle-3.9.16 IDE for Python
python-tkinter-3.10.9 Python interface to the Tk graphical toolkit
python-tkinter-3.9.16 Python interface to the Tk graphical toolkit
python3-3.9p1 meta-package to install the current version of python 3
quirks-6.42 exceptions to pkg_add rules and cache
raptor-2.0.15p4 RDF Parser Toolkit for Redland
rasqal-0.9.33p3 RDF Query Library for Redland
redland-1.0.17p9 high-level interface for RDF
rsync-3.2.5pl0 mirroring/synchronization over low bandwidth links
serf-1.3.9p0 high performance HTTP client library
shared-mime-info-2.2 shared mime database for desktops
snappy-1.1.9 fast compression/decompression library
sound-theme-freedesktop-0.8p0 XDG sound theme
speex-1.2.1 patent-free speech codec
speexdsp-1.2.1 speech processing DSP library
sqlite3-3.39.3 embedded SQL implementation
sqlite3-tcl-3.39.2 Tcl bindings for SQLite3
startup-notification-0.12p8 library for tracking application startup
stockfish-14.1 open source chess engine
subversion-1.14.2 subversion revision control system
taglib-1.12 managing meta-data of audio formats
tcl-8.5.19p6 Tool Command Language
tcl-8.6.12 Tool Command Language
texlive_synctex-2021 synctex for TeXLive typesetting distribution
tiff-4.4.0p2 tools and library routines for working with TIFF images
tk-8.5.19p2 graphical toolkit for Tcl
tk-8.6.12 graphical toolkit for Tcl
tnef-1.4.12p1 decode MS-TNEF MIME attachments
twolame-0.4.0 optimised MPEG Audio Layer 2 (MP2) encoder
unrar-6.12v2 extract, list, and test RAR archives
unzip-6.0p16 extract, list & test files in a ZIP archive
wavpack-5.5.0 audio codec for lossless, lossy and hybrid compression
webkitgtk40-2.38.3 GTK+ port of the WebKit (4.0) rendering engine
webkitgtk41-2.38.3 GTK+ port of the WebKit (4.1) rendering engine
woff2-1.0.2p0 Web Open Font Format 2.0 library
xdg-utils-1.1.3.20210805 utilities to assist desktop integration tasks
xpdf-3.04p2v0 PDF viewer for X11
xz-5.2.5p2 LZMA compression and decompression tools
yelp-42.2 GNOME help browser
yelp-xsl-42.1 XSLT stylesheets for yelp
zip-3.0p1 create/update ZIP files compatible with PKZip(tm)
zstd-1.5.2 zstandard fast real-time compression algorithm
opendev$
opendev$
opendev$
opendev$ dmesg
OpenBSD 7.2 (GENERIC.MP) #758: Tue Sep 27 11:57:54 MDT 2022
dera...@amd64.openbsd.org:/usr/src/sys/arch/amd64/compile/GENERIC.MP
real mem = 17028485120 (16239MB)
avail mem = 16495009792 (15730MB)
random: good seed from bootblocks
mpath0 at root
scsibus0 at mpath0: 256 targets
mainbus0 at root
bios0 at mainbus0: SMBIOS rev. 2.6 @ 0xe9fb0 (80 entries)
bios0: vendor Hewlett-Packard version "786G2 v02.03" date 10/19/2015
bios0: Hewlett-Packard HP Compaq 6000 Pro SFF PC
acpi0 at bios0: ACPI 1.0
acpi0: sleep states S0 S3 S4 S5
acpi0: tables DSDT FACP APIC ASF! MCFG TCPA SLIC HPET
acpi0: wakeup devices PCI0(S4) COM1(S4) PEG1(S4) PEG2(S4) IGBE(S4) PCX1(S4)
PCX2(S4) PCX5(S4) PCX6(S4) HUB_(S4) USB1(S3) USB2(S3) USB3(S3) USB4(S3)
USB5(S3) USB6(S3) [...]
acpitimer0 at acpi0: 3579545 Hz, 24 bits
acpimadt0 at acpi0 addr 0xfee00000: PC-AT compat
cpu0 at mainbus0: apid 0 (boot processor)
cpu0: Intel(R) Core(TM)2 Duo CPU E7500 @ 2.93GHz, 2926.06 MHz, 06-17-0a
cpu0:
FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE,SSE3,DTES64,MWAIT,DS-CPL,VMX,EST,TM2,SSSE3,CX16,xTPR,PDCM,SSE4.1,XSAVE,NXE,LONG,LAHF,PERF,SENSOR,MELTDOWN
cpu0: 32KB 64b/line 8-way D-cache, 32KB 64b/line 8-way I-cache, 3MB 64b/line
12-way L2 cache
cpu0: smt 0, core 0, package 0
mtrr: Pentium Pro MTRR support, 7 var ranges, 88 fixed ranges
cpu0: apic clock running at 266MHz
cpu0: mwait min=64, max=64, C-substates=0.2.2.2.2, IBE
cpu1 at mainbus0: apid 1 (application processor)
cpu1: Intel(R) Core(TM)2 Duo CPU E7500 @ 2.93GHz, 2926.01 MHz, 06-17-0a
cpu1:
FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE,SSE3,DTES64,MWAIT,DS-CPL,VMX,EST,TM2,SSSE3,CX16,xTPR,PDCM,SSE4.1,XSAVE,NXE,LONG,LAHF,PERF,SENSOR,MELTDOWN
cpu1: 32KB 64b/line 8-way D-cache, 32KB 64b/line 8-way I-cache, 3MB 64b/line
12-way L2 cache
cpu1: smt 0, core 1, package 0
ioapic0 at mainbus0: apid 1 pa 0xfec00000, version 20, 24 pins, remapped
acpimcfg0 at acpi0
acpimcfg0: addr 0xf4000000, bus 0-63
acpihpet0 at acpi0: 14318179 Hz
acpiprt0 at acpi0: bus 0 (PCI0)
acpiprt1 at acpi0: bus -1 (PEG1)
acpiprt2 at acpi0: bus -1 (PEG2)
acpiprt3 at acpi0: bus 32 (PCX1)
acpiprt4 at acpi0: bus 48 (PCX2)
acpiprt5 at acpi0: bus -1 (PCX5)
acpiprt6 at acpi0: bus -1 (PCX6)
acpiprt7 at acpi0: bus 16 (HUB_)
acpipci0 at acpi0 PCI0: 0x00000000 0x00000011 0x00000001
acpicmos0 at acpi0
com0 at acpi0 COM1 addr 0x3f8/0x8 irq 4: ns16550a, 16 byte fifo
"PNP0003" at acpi0 not configured
tpm0 at acpi0 TPM_ 1.2 (TIS) addr 0x4e/0x2, device 0xffffffff rev 0xff
acpibtn0 at acpi0: PBTN
"PNP0C14" at acpi0 not configured
acpicpu0 at acpi0: !C3(100@50 mwait.1@0x30), !C2(500@17 mwait.1@0x10),
C1(1000@1 mwait.1), PSS
acpicpu1 at acpi0: !C3(100@50 mwait.1@0x30), !C2(500@17 mwait.1@0x10),
C1(1000@1 mwait.1), PSS
cpu0: Enhanced SpeedStep 2926 MHz: speeds: 2933, 2128, 1596 MHz
pci0 at mainbus0 bus 0
pchb0 at pci0 dev 0 function 0 "Intel Q45 Host" rev 0x03
inteldrm0 at pci0 dev 2 function 0 "Intel Q45 Video" rev 0x03
drm0 at inteldrm0
intagp0 at inteldrm0
agp0 at intagp0: aperture at 0xe0000000, size 0x10000000
inteldrm0: apic 1 int 16, G45, gen 4
"Intel Q45 Video" rev 0x03 at pci0 dev 2 function 1 not configured
"Intel Q45 HECI" rev 0x03 at pci0 dev 3 function 0 not configured
puc0 at pci0 dev 3 function 3 "Intel Q45 KT" rev 0x03: ports: 16 com
com4 at puc0 port 0 apic 1 int 17: ns16550a, 16 byte fifo
com4: probed fifo depth: 15 bytes
em0 at pci0 dev 25 function 0 "Intel ICH10 D BM LM" rev 0x02: apic 1 int 19,
address 78:e3:b5:ca:fa:e3
uhci0 at pci0 dev 26 function 0 "Intel 82801JD USB" rev 0x02: apic 1 int 20
uhci1 at pci0 dev 26 function 1 "Intel 82801JD USB" rev 0x02: apic 1 int 21
uhci2 at pci0 dev 26 function 2 "Intel 82801JD USB" rev 0x02: apic 1 int 22
ehci0 at pci0 dev 26 function 7 "Intel 82801JD USB" rev 0x02: apic 1 int 22
usb0 at ehci0: USB revision 2.0
uhub0 at usb0 configuration 1 interface 0 "Intel EHCI root hub" rev 2.00/1.00
addr 1
azalia0 at pci0 dev 27 function 0 "Intel 82801JD HD Audio" rev 0x02: apic 1 int
21
azalia0: codecs: Realtek ALC662
audio0 at azalia0
ppb0 at pci0 dev 28 function 0 "Intel 82801JD PCIE" rev 0x02
pci1 at ppb0 bus 32
ppb1 at pci0 dev 28 function 1 "Intel 82801JD PCIE" rev 0x02: apic 1 int 21
pci2 at ppb1 bus 48
uhci3 at pci0 dev 29 function 0 "Intel 82801JD USB" rev 0x02: apic 1 int 20
uhci4 at pci0 dev 29 function 1 "Intel 82801JD USB" rev 0x02: apic 1 int 21
uhci5 at pci0 dev 29 function 2 "Intel 82801JD USB" rev 0x02: apic 1 int 22
ehci1 at pci0 dev 29 function 7 "Intel 82801JD USB" rev 0x02: apic 1 int 20
usb1 at ehci1: USB revision 2.0
uhub1 at usb1 configuration 1 interface 0 "Intel EHCI root hub" rev 2.00/1.00
addr 1
ppb2 at pci0 dev 30 function 0 "Intel 82801BA Hub-to-PCI" rev 0xa2
pci3 at ppb2 bus 16
pcib0 at pci0 dev 31 function 0 "Intel 82801JD LPC" rev 0x02
ahci0 at pci0 dev 31 function 2 "Intel 82801JD AHCI" rev 0x02: apic 1 int 18,
AHCI 1.2
ahci0: port 0: 3.0Gb/s
ahci0: port 1: 3.0Gb/s
ahci0: port 2: 3.0Gb/s
ahci0: port 3: 3.0Gb/s
scsibus1 at ahci0: 32 targets
sd0 at scsibus1 targ 0 lun 0: <ATA, KINGSTON SA400S3, S3E0> naa.50026b778495498a
sd0: 114473MB, 512 bytes/sector, 234441648 sectors, thin
sd1 at scsibus1 targ 1 lun 0: <ATA, KINGSTON SA400S3, S3E0> naa.50026b7784986b90
sd1: 114473MB, 512 bytes/sector, 234441648 sectors, thin
sd2 at scsibus1 targ 2 lun 0: <ATA, CT240BX500SSD1, M6CR> naa.500a0751e6400397
sd2: 228936MB, 512 bytes/sector, 468862128 sectors, thin
sd3 at scsibus1 targ 3 lun 0: <ATA, CT240BX500SSD1, M6CR> naa.500a0751e64003a7
sd3: 228936MB, 512 bytes/sector, 468862128 sectors, thin
usb2 at uhci0: USB revision 1.0
uhub2 at usb2 configuration 1 interface 0 "Intel UHCI root hub" rev 1.00/1.00
addr 1
usb3 at uhci1: USB revision 1.0
uhub3 at usb3 configuration 1 interface 0 "Intel UHCI root hub" rev 1.00/1.00
addr 1
usb4 at uhci2: USB revision 1.0
uhub4 at usb4 configuration 1 interface 0 "Intel UHCI root hub" rev 1.00/1.00
addr 1
usb5 at uhci3: USB revision 1.0
uhub5 at usb5 configuration 1 interface 0 "Intel UHCI root hub" rev 1.00/1.00
addr 1
usb6 at uhci4: USB revision 1.0
uhub6 at usb6 configuration 1 interface 0 "Intel UHCI root hub" rev 1.00/1.00
addr 1
usb7 at uhci5: USB revision 1.0
uhub7 at usb7 configuration 1 interface 0 "Intel UHCI root hub" rev 1.00/1.00
addr 1
isa0 at pcib0
isadma0 at isa0
pckbc0 at isa0 port 0x60/5 irq 1 irq 12
pckbd0 at pckbc0 (kbd slot)
wskbd0 at pckbd0: console keyboard
pcppi0 at isa0 port 0x61
spkr0 at pcppi0
vscsi0 at root
scsibus2 at vscsi0: 256 targets
softraid0 at root
scsibus3 at softraid0: 256 targets
sd4 at scsibus3 targ 1 lun 0: <OPENBSD, SR RAID 1, 006>
sd4: 114473MB, 512 bytes/sector, 234441056 sectors
sd5 at scsibus3 targ 2 lun 0: <OPENBSD, SR RAID 1, 006>
sd5: 228936MB, 512 bytes/sector, 468861536 sectors
root on sd4a (e1e37bd2277d58fa.a) swap on sd4b dump on sd4b
WARNING: clock gained 2 days
WARNING: CHECK AND RESET THE DATE!
inteldrm0: 1024x768, 32bpp
wsdisplay0 at inteldrm0 mux 1: console (std, vt100 emulation), using wskbd0
wsdisplay0: screen 1-5 added (std, vt100 emulation)
syncing disks... done
rebooting...
OpenBSD 7.2 (GENERIC.MP) #758: Tue Sep 27 11:57:54 MDT 2022
dera...@amd64.openbsd.org:/usr/src/sys/arch/amd64/compile/GENERIC.MP
real mem = 17028485120 (16239MB)
avail mem = 16494997504 (15730MB)
random: good seed from bootblocks
mpath0 at root
scsibus0 at mpath0: 256 targets
mainbus0 at root
bios0 at mainbus0: SMBIOS rev. 2.6 @ 0xe9fb0 (80 entries)
bios0: vendor Hewlett-Packard version "786G2 v02.03" date 10/19/2015
bios0: Hewlett-Packard HP Compaq 6000 Pro SFF PC
acpi0 at bios0: ACPI 1.0
acpi0: sleep states S0 S3 S4 S5
acpi0: tables DSDT FACP APIC ASF! MCFG TCPA SLIC HPET
acpi0: wakeup devices PCI0(S4) COM1(S4) PEG1(S4) PEG2(S4) IGBE(S4) PCX1(S4)
PCX2(S4) PCX5(S4) PCX6(S4) HUB_(S4) USB1(S3) USB2(S3) USB3(S3) USB4(S3)
USB5(S3) USB6(S3) [...]
acpitimer0 at acpi0: 3579545 Hz, 24 bits
acpimadt0 at acpi0 addr 0xfee00000: PC-AT compat
cpu0 at mainbus0: apid 0 (boot processor)
cpu0: Intel(R) Core(TM)2 Duo CPU E7500 @ 2.93GHz, 2926.09 MHz, 06-17-0a
cpu0:
FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE,SSE3,DTES64,MWAIT,DS-CPL,VMX,EST,TM2,SSSE3,CX16,xTPR,PDCM,SSE4.1,XSAVE,NXE,LONG,LAHF,PERF,SENSOR,MELTDOWN
cpu0: 32KB 64b/line 8-way D-cache, 32KB 64b/line 8-way I-cache, 3MB 64b/line
12-way L2 cache
cpu0: smt 0, core 0, package 0
mtrr: Pentium Pro MTRR support, 7 var ranges, 88 fixed ranges
cpu0: apic clock running at 266MHz
cpu0: mwait min=64, max=64, C-substates=0.2.2.2.2, IBE
cpu1 at mainbus0: apid 1 (application processor)
cpu1: Intel(R) Core(TM)2 Duo CPU E7500 @ 2.93GHz, 2926.01 MHz, 06-17-0a
cpu1:
FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE,SSE3,DTES64,MWAIT,DS-CPL,VMX,EST,TM2,SSSE3,CX16,xTPR,PDCM,SSE4.1,XSAVE,NXE,LONG,LAHF,PERF,SENSOR,MELTDOWN
cpu1: 32KB 64b/line 8-way D-cache, 32KB 64b/line 8-way I-cache, 3MB 64b/line
12-way L2 cache
cpu1: smt 0, core 1, package 0
ioapic0 at mainbus0: apid 1 pa 0xfec00000, version 20, 24 pins, remapped
acpimcfg0 at acpi0
acpimcfg0: addr 0xf4000000, bus 0-63
acpihpet0 at acpi0: 14318179 Hz
acpiprt0 at acpi0: bus 0 (PCI0)
acpiprt1 at acpi0: bus -1 (PEG1)
acpiprt2 at acpi0: bus -1 (PEG2)
acpiprt3 at acpi0: bus 32 (PCX1)
acpiprt4 at acpi0: bus 48 (PCX2)
acpiprt5 at acpi0: bus -1 (PCX5)
acpiprt6 at acpi0: bus -1 (PCX6)
acpiprt7 at acpi0: bus 16 (HUB_)
acpipci0 at acpi0 PCI0: 0x00000000 0x00000011 0x00000001
acpicmos0 at acpi0
com0 at acpi0 COM1 addr 0x3f8/0x8 irq 4: ns16550a, 16 byte fifo
"PNP0003" at acpi0 not configured
tpm0 at acpi0 TPM_ 1.2 (TIS) addr 0x4e/0x2, device 0xffffffff rev 0xff
acpibtn0 at acpi0: PBTN
"PNP0C14" at acpi0 not configured
acpicpu0 at acpi0: !C3(100@50 mwait.1@0x30), !C2(500@17 mwait.1@0x10),
C1(1000@1 mwait.1), PSS
acpicpu1 at acpi0: !C3(100@50 mwait.1@0x30), !C2(500@17 mwait.1@0x10),
C1(1000@1 mwait.1), PSS
cpu0: Enhanced SpeedStep 2926 MHz: speeds: 2933, 2128, 1596 MHz
pci0 at mainbus0 bus 0
pchb0 at pci0 dev 0 function 0 "Intel Q45 Host" rev 0x03
inteldrm0 at pci0 dev 2 function 0 "Intel Q45 Video" rev 0x03
drm0 at inteldrm0
intagp0 at inteldrm0
agp0 at intagp0: aperture at 0xe0000000, size 0x10000000
inteldrm0: apic 1 int 16, G45, gen 4
"Intel Q45 Video" rev 0x03 at pci0 dev 2 function 1 not configured
"Intel Q45 HECI" rev 0x03 at pci0 dev 3 function 0 not configured
puc0 at pci0 dev 3 function 3 "Intel Q45 KT" rev 0x03: ports: 16 com
com4 at puc0 port 0 apic 1 int 17: ns16550a, 16 byte fifo
com4: probed fifo depth: 0 bytes
em0 at pci0 dev 25 function 0 "Intel ICH10 D BM LM" rev 0x02: apic 1 int 19,
address 78:e3:b5:ca:fa:e3
uhci0 at pci0 dev 26 function 0 "Intel 82801JD USB" rev 0x02: apic 1 int 20
uhci1 at pci0 dev 26 function 1 "Intel 82801JD USB" rev 0x02: apic 1 int 21
uhci2 at pci0 dev 26 function 2 "Intel 82801JD USB" rev 0x02: apic 1 int 22
ehci0 at pci0 dev 26 function 7 "Intel 82801JD USB" rev 0x02: apic 1 int 22
usb0 at ehci0: USB revision 2.0
uhub0 at usb0 configuration 1 interface 0 "Intel EHCI root hub" rev 2.00/1.00
addr 1
azalia0 at pci0 dev 27 function 0 "Intel 82801JD HD Audio" rev 0x02: apic 1 int
21
azalia0: codecs: Realtek ALC662
audio0 at azalia0
ppb0 at pci0 dev 28 function 0 "Intel 82801JD PCIE" rev 0x02
pci1 at ppb0 bus 32
ppb1 at pci0 dev 28 function 1 "Intel 82801JD PCIE" rev 0x02: apic 1 int 21
pci2 at ppb1 bus 48
uhci3 at pci0 dev 29 function 0 "Intel 82801JD USB" rev 0x02: apic 1 int 20
uhci4 at pci0 dev 29 function 1 "Intel 82801JD USB" rev 0x02: apic 1 int 21
uhci5 at pci0 dev 29 function 2 "Intel 82801JD USB" rev 0x02: apic 1 int 22
ehci1 at pci0 dev 29 function 7 "Intel 82801JD USB" rev 0x02: apic 1 int 20
usb1 at ehci1: USB revision 2.0
uhub1 at usb1 configuration 1 interface 0 "Intel EHCI root hub" rev 2.00/1.00
addr 1
ppb2 at pci0 dev 30 function 0 "Intel 82801BA Hub-to-PCI" rev 0xa2
pci3 at ppb2 bus 16
pcib0 at pci0 dev 31 function 0 "Intel 82801JD LPC" rev 0x02
ahci0 at pci0 dev 31 function 2 "Intel 82801JD AHCI" rev 0x02: apic 1 int 18,
AHCI 1.2
ahci0: port 0: 3.0Gb/s
ahci0: port 1: 3.0Gb/s
ahci0: port 2: 3.0Gb/s
ahci0: port 3: 3.0Gb/s
scsibus1 at ahci0: 32 targets
sd0 at scsibus1 targ 0 lun 0: <ATA, KINGSTON SA400S3, S3E0> naa.50026b778495498a
sd0: 114473MB, 512 bytes/sector, 234441648 sectors, thin
sd1 at scsibus1 targ 1 lun 0: <ATA, KINGSTON SA400S3, S3E0> naa.50026b7784986b90
sd1: 114473MB, 512 bytes/sector, 234441648 sectors, thin
sd2 at scsibus1 targ 2 lun 0: <ATA, CT240BX500SSD1, M6CR> naa.500a0751e6400397
sd2: 228936MB, 512 bytes/sector, 468862128 sectors, thin
sd3 at scsibus1 targ 3 lun 0: <ATA, CT240BX500SSD1, M6CR> naa.500a0751e64003a7
sd3: 228936MB, 512 bytes/sector, 468862128 sectors, thin
usb2 at uhci0: USB revision 1.0
uhub2 at usb2 configuration 1 interface 0 "Intel UHCI root hub" rev 1.00/1.00
addr 1
usb3 at uhci1: USB revision 1.0
uhub3 at usb3 configuration 1 interface 0 "Intel UHCI root hub" rev 1.00/1.00
addr 1
usb4 at uhci2: USB revision 1.0
uhub4 at usb4 configuration 1 interface 0 "Intel UHCI root hub" rev 1.00/1.00
addr 1
usb5 at uhci3: USB revision 1.0
uhub5 at usb5 configuration 1 interface 0 "Intel UHCI root hub" rev 1.00/1.00
addr 1
usb6 at uhci4: USB revision 1.0
uhub6 at usb6 configuration 1 interface 0 "Intel UHCI root hub" rev 1.00/1.00
addr 1
usb7 at uhci5: USB revision 1.0
uhub7 at usb7 configuration 1 interface 0 "Intel UHCI root hub" rev 1.00/1.00
addr 1
isa0 at pcib0
isadma0 at isa0
pckbc0 at isa0 port 0x60/5 irq 1 irq 12
pckbd0 at pckbc0 (kbd slot)
wskbd0 at pckbd0: console keyboard
pcppi0 at isa0 port 0x61
spkr0 at pcppi0
vscsi0 at root
scsibus2 at vscsi0: 256 targets
softraid0 at root
scsibus3 at softraid0: 256 targets
sd4 at scsibus3 targ 1 lun 0: <OPENBSD, SR RAID 1, 006>
sd4: 114473MB, 512 bytes/sector, 234441056 sectors
sd5 at scsibus3 targ 2 lun 0: <OPENBSD, SR RAID 1, 006>
sd5: 228936MB, 512 bytes/sector, 468861536 sectors
root on sd4a (e1e37bd2277d58fa.a) swap on sd4b dump on sd4b
inteldrm0: 1024x768, 32bpp
wsdisplay0 at inteldrm0 mux 1: console (std, vt100 emulation), using wskbd0
wsdisplay0: screen 1-5 added (std, vt100 emulation)
opendev$
opendev$
opendev$ exit
Script done on Sat Jan 28 13:12:32 2023
Script started on Sat Jan 28 13:20:25 2023
$ uname -a
FreeBSD freedev.home 13.1-RELEASE FreeBSD 13.1-RELEASE
releng/13.1-n250148-fc952ac2212 GENERIC amd64
$ ls /tmp
$ python3.9 py-lmdb-py-lmdb_1.4.0/examples/address-book.py
DB: home
b'dad' b'011232211'
b'dentist' b'044415121'
b'hospital' b'078126321'
b'mum' b'012345678'
DB: business
b'boss' b'0123151232'
b'coworker' b'0147652935'
b'customer' b'0553211232'
b'manager' b'0644810485'
b'vendor' b'0917465628'
Updating number for dentist
Deleting number for hospital
Home DB is now:
b'dad' b'011232211'
b'dentist' b'099991231'
b'mum' b'012345678'
Boss telephone number: b'0123151232'
Deleting all numbers from business DB:
Adding number for recruiter to business DB
Business DB is now:
b'recruiter' b'04123125324'
$ ls /tmp
address-book.lmdb
$
$ cat py-lmdb-py-lmdb_1.4.0/examples/address-book.py
import lmdb
# Open (and create if necessary) our database environment. Must specify
# max_dbs=... since we're opening subdbs.
env = lmdb.open('/tmp/address-book.lmdb', max_dbs=10)
# Now create subdbs for home and business addresses.
home_db = env.open_db(b'home')
business_db = env.open_db(b'business')
# Add some telephone numbers to each DB:
with env.begin(write=True) as txn:
txn.put(b'mum', b'012345678', db=home_db)
txn.put(b'dad', b'011232211', db=home_db)
txn.put(b'dentist', b'044415121', db=home_db)
txn.put(b'hospital', b'078126321', db=home_db)
txn.put(b'vendor', b'0917465628', db=business_db)
txn.put(b'customer', b'0553211232', db=business_db)
txn.put(b'coworker', b'0147652935', db=business_db)
txn.put(b'boss', b'0123151232', db=business_db)
txn.put(b'manager', b'0644810485', db=business_db)
# Iterate each DB to show the keys are sorted:
with env.begin() as txn:
for name, db in ('home', home_db), ('business', business_db):
print('DB:', name)
for key, value in txn.cursor(db=db):
print(' ', key, value)
print()
# Now let's update some phone numbers. We can specify the default subdb when
# starting the transaction, rather than pass it in every time:
with env.begin(write=True, db=home_db) as txn:
print('Updating number for dentist')
txn.put(b'dentist', b'099991231')
print('Deleting number for hospital')
txn.delete(b'hospital')
print()
print('Home DB is now:')
for key, value in txn.cursor():
print(' ', key, value)
print()
# Now let's look up a number in the business DB
with env.begin(db=business_db) as txn:
print('Boss telephone number:', txn.get(b'boss'))
print()
# We got fired, time to delete all keys from the business DB.
with env.begin(write=True) as txn:
print('Deleting all numbers from business DB:')
txn.drop(business_db, delete=False)
print('Adding number for recruiter to business DB')
txn.put(b'recruiter', b'04123125324', db=business_db)
print('Business DB is now:')
for key, value in txn.cursor(db=business_db):
print(' ', key, value)
print()
$
$
$ pkg info lmdb
lmdb-0.9.29_1,1
Name : lmdb
Version : 0.9.29_1,1
Installed on : Sat Jan 28 11:16:40 2023 UTC
Origin : databases/lmdb
Architecture : FreeBSD:13:amd64
Prefix : /usr/local
Categories : databases
Licenses : OPENLDAP
Maintainer : delp...@freebsd.org
WWW : https://symas.com/lmdb/
Comment : OpenLDAP Lightning Memory-Mapped Database
Shared Libs provided:
liblmdb.so.0
Annotations :
FreeBSD_version: 1301000
repo_type : binary
repository : FreeBSD
Flat size : 673KiB
Description :
LMDB is an ultra-fast, ultra-compact key-value data
store developed by Symas for the OpenLDAP Project.
It uses memory-mapped files, so it has the read
performance of a pure in-memory database while still
offering the persistence of standard disk-based
databases, and is only limited to the size of the
virtual address space, (it is not limited to the
size of physical RAM). LMDB was originally called
MDB, but was renamed to avoid confusion with other
software associated with the name MDB.
WWW: https://symas.com/lmdb/
$
$ exit
Script done on Sat Jan 28 13:23:07 2023
