Google Workspace Delegate Calendars on iPhone
Google Workspace Delegated Calendars do not show up on the Apple Calendar on iPhone. It does so on my Mac, under a "Delegated Calendars" section like so:
Notes
A collection of interconnected fragments, ideas, and less polished thoughts.
Finding Bluetooth LMP version on MacOS
Finding information about devices isn't exactly straightforward on MacOS.
Ceph PG Scaling
At croit, the recommendation is to maintain the number of PGs in a pool such that each PG roughly holds about 45G of data. In order to achieve the number, the following calculation works:
Bridge MTUs in Proxmox
General Networking says that:
The X-Forwarded-For HTTP Header
The X-Forwarded-For is a request header that should contain the originating IP address (client IP) and the proxies that the client passes through.
Static MAC Address for a Linux Bridge on Debian or Proxmox
Everytime a systemctl restart networking is run on Proxmox or the host is rebooted, the bridges vmbr{0,1,2..} are assigned different MAC Addresses. Normally this is fine but as I am running my home...
Getting Rid of fwbr- Interfaces on Proxmox
Proxmox creates fwbr interfaces when you start a VM with any bridge attached, as seen here. This is done because firewall rules (using the proxmox firewall) cannot be set directly on a bridge,...
EVPN + VXLAN in Proxmox SDN
EVPN is the control plane that's responsible for populating the forwarding table and the routing table, while VXLAN is the data plane that's responsible for carry packets between the addresses in...
Migrating VMs on Encrypted Proxmox
I have three Proxmox nodes, two of them I installed with zfs native encryption (after switching from LUKS encryption, learning about the two disk overhead) and the third one I installed without...
Hidden Folders in Finder
Hidden folders are disabled by default on MacOS, which means it won't see any files and folders starting a . (period/dot).
Deloading in Hypertrophy Training
Deloading is a period of off-training that is either programmed or reactive, and is meant for providing muscle groups with more time to recover. However, with recent research, the amount of time...
Save Up on Expenses
- sbi-cashback-card
SBI Cashback Card
As part of save-up-expenses initiative, I use the SBI Cashback card which provides 5% back on online and 1% back on offline spends. Here are the list of categories exempt from the cashback:
Enable Key Spam or Disable Special Characters on MacOS
MacOS has this behaviour where if you hold a key, such as in my case, holding k to move up in VSCode, a special character popup appears where you can choose an alternative character for the key...
Increase Disk Space on Proxmox VM
To increase disk space on a Proxmox VM, two steps are required: growing the partition and resizing the filesystem[^1].
OSD Scrubs on HDD v/s SSD
OSD Max Scrubs (osdmaxscrubs) is a Ceph configuration parameter that defines how many simultaneous scrub operations an OSD can perform. Scrubbing is Ceph's data integrity checking mechanism that...
Moving from Wordpress to Quartz
Wordpress is a fantastic CMS, no doubt, something which I have relied on since my early days of self-hosting in 2019. However, the problem wasn't related to software; it was more mental. The more I...
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Querying Ceph Configuration
These commands fetch configuration as reported by the running daemons.
Ceph
- querying-ceph-config
Nearfull Ratio
monosdnearfull_ratio is the maximum / threshold percentage of disk space used before an OSD is considered as a nearfull-osd. When utilisation crosses nearfull-ratio, it can reach backfillfull-ratio...
Backfillfull Ratio
The maximum or threshold percentage of disk space that can be used before an OSD is considered too full to backfill. This ratio is reached after crossing nearfull-ratio. Once utilisation crosses...
August in the Water
Full Ratio
Nearfull OSD
Replacing a failed drive in a Ceph Cluster
Drives that are failing might emit errors in one of the parameters of the SMART log which can be obtained with:
Ceph Quincy MDS Standby-Replay Memory Leak
The Ceph MDS standby-replay daemon is affected by a now-fixed memory leak bug that causes gradually increasing memory consumption[^1].
Slow Operations in Ceph OSDs
When Ceph reports slow operations, they can be investigated using the dumphistoricops command[^1].
Ceph Operation v/s Subop Latency
- Measures the total time taken for a client operation (read/write) to complete
MDS failing to Respond to Cache Pressure
MDS cache pressure occurs when the Metadata Server (MDS) requests clients to release their cache, but clients are either slow to respond or fail to honor these requests[^1].
Ceph OSD Memory Usage
The osdmemorytarget parameter in Ceph sets a soft limit for the memory usage of Object Storage Daemons (OSDs). It helps manage how much memory each OSD uses, but it doesn't enforce a strict cap....
Compacting Ceph OSDs
RocksDB compaction in Ceph is a process aimed at reducing fragmentation in the RocksDB database and improving the performance of daemons like OSDs and MONs. Over time, as clusters handle a large...
Ceph Spurious Read Errors
Transient read errors in ceph (also referred to as spurious read errors) are failures that occur briefly and then resolve on subsequent attempts. Ceph retries the read operation up to four times. If...