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LinkedIn realizes its users have been bathing in AI slop, offers a shower
10 hours ago
- New storage-inspired memory tech could enable GPUs with multiple TB of high-bandwidth flash, combining SSD capacities with HBM-like speeds.
- Open source project ShieldFont uses poisoned fonts to fool AI scrapers and protect copy.
- For the first time, majority of corporate IT workloads are now off-premises, according to a survey.
- Closed AI models refuse to help researchers fix Linux bugs, highlighting open source advantages.
- Intel's Optane memory is praised as ideal for AI workloads but discontinued before its potential could be realized.
- Russian hackers pose as Signal support to launch phishing attacks; US takes down Iranian propaganda sites.
- Microsoft patches for on-prem SharePoint fail, leaving it under zero-day attack.
- DEF CON's Franklin project enlists hackers to harden critical infrastructure; voting village reports successful.
- EQT buys majority stake in Swiss cybersecurity firm Acronis at a $3.5B+ valuation.
- Ten years after first corporate ransomware, infosec expert Mikko Hyppönen sees no end in sight.
- FOSS movement aims to break another Microsoft monopoly after 20 years of failure.
- GNOME introduces Simple-taskbar to mimic Windows look without extensions; Flashback offers another option.
- Final release of Debian on x86-32 (versions 13.6 and 12.15) marks the end of an era.
- Critical vulnerabilities in Joomla extensions iCagenda and Balbooa Forms exploited by attackers.
- Frame: a new X11 server implemented directly in assembly joins other X11 implementations.
- Cinnamon 6.8 will support Wayland optionally, giving Linux Mint users both display server choices.
"Disk Not Ejected Properly": What It Means
21 days ago
- The 'Disk Not Ejected Properly' alert on macOS indicates the system unexpectedly lost communication with a storage device, either due to physical disconnection or a communication failure while the device remained attached.
- Mounting a disk involves IOKit managing hardware, DiskArbitration handling volume mounting, and filesystem drivers preparing the volume; unmounting gracefully only removes the mount point, while ejection discards all IOKit device objects.
- Repeated alerts often stem from hardware issues like faulty cables, USB ports, or hubs, or from firmware crashes in the storage device itself, which may be resolved by erasing or replacing the drive.
- While occasional alerts are generally harmless, frequent occurrences can risk data corruption if writes are interrupted, especially during backups, and should be investigated to ensure reliable storage.
Reading the internals of Postgres: Database cluster, databases, and tables
a month ago
- PostgreSQL uses a 'database cluster' to refer to a single instance managing multiple databases, not multiple servers.
- Databases and other objects are identified by OIDs (unsigned integers), with user-created objects starting from OID 16384.
- System catalogs like pg_class and pg_database store metadata and are regular tables that can be queried.
- The physical structure centers on the data directory ($PGDATA), containing subdirectories for each database (named by OID) and tables.
- Tables and indexes are stored in files under base/{database_oid}/{relfilenode}, with forks for free space and visibility maps.
- VACUUM FULL can change a table's relfilenode, decoupling it from its OID.
- Tablespaces allow storing database objects in custom directories, with symlinks in $PGDATA/pg_tblspc/.
- Heap tables consist of 8KB pages containing headers, line pointers, and tuples stored from the page end.
- TOAST handles large values by storing them externally in a separate table, chunked and indexed.
- Writing tuples involves updating page headers and line pointers, with alignment considerations.
- Reading tuples can use sequential scans or index scans (e.g., B-tree), depending on the query.

storage

LinkedIn realizes its users have been bathing in AI slop, offers a shower

"Disk Not Ejected Properly": What It Means

Reading the internals of Postgres: Database cluster, databases, and tables