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Browsing Posts tagged ESXi

Perché aggiornare a VMware vSphere 6.5 (e perchè no)

2 Febbraio 2018
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Reading Time: 10 minutesQuesto è un articolo realizzato per il blog di StarWind con l’obiettivo di fornire idee e spunti per valutare se aggiornare a vSphere 6.5 o meno. Per la versione in inglese, vedere il post originale. VMware vSphere 6.5 è, al momento, l’ultima versione della soluzione di virtualizzazione server di VMware, ma la nuova versione (che potrebbe essere una “minor release”) è già testabile che vuole partecipare alla beta pubblica (per chi è interessato c’è la pagina di registrazione: https://secure.vmware.com/43478_vSphere_Beta_Reg).

VMware , , ,

NIC performance issues in vSphere 6.5

28 Dicembre 2017
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Reading Time: 3 minutesNow that the PSOD on vSphere 6.5 and 10 Gbps NICs issue is finally solved seems that vSphere 6.5 critical bugs are closed, but it’s not totally true. During an upgrade from a vSphere 6.0, I’ve found a really strange iSCSI storage issues where all the VMs on the iSCSI datastore were so slow to become un-usable. First I was thinking about drivers or firmware, in the hosts and in the NIC (1 Gbps) or the firmware on the storage.

VMware, vNetworking ,

ESXi 6.5 scratch partition issues

8 Dicembre 2017
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Reading Time: 3 minutesIn the VMware ESXi 6.x partitions layout, usually, there is a partition called “scratch” that hosts the log, the updates, and other temporal files. Scratch space is configured automatically during installation or first boot of an ESXi host and is not required to be manually configured. If you install ESXi on a local hardware disk (or also if you are using a remote LUN in “boot from SAN” mode), this partition is built during the installation phase (it’s 4 GB Fat16 partition created on the target device during installation, if there is sufficient space). If […]

VMware ,

ESXi 6.5 host fails with PSOD

23 Ottobre 2017
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Reading Time: 3 minutesSeems that there are still some issues with vSphere 6.5, with a possible PSOD (Purple Screen Of the Death) after upgrade to 6.5U1 on ESXi hosts using 10 Gbps NICs. The VMware KB 2151749 describe this issue and explains that this occurs because Netqueue commit phase abruptly stop due to the failure of hardware activation of a Rx queue. As a result, Internal data-structure of the Netqueue layer’s could go out of sync with the device and cause PSOD.

VMware ,

Continuous install on ESXi hosts after vSphere Replication deployment

11 Ottobre 2017
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Reading Time: 3 minutesIf you are going to using vSphere Replication you will notice, after the deployment of the two virtual appliances a continuous (also each minute) logging of installation activities on all the ESXi hosts in the protected cluster. This is quite annoying but also is going to fill up your log both in the ESXi hosts and in the vCenter database (are all tasks visible in the the vCenter console).

VMware

LLDP issues with DVS and Dell switches

3 Ottobre 2017
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Reading Time: 3 minutesThe Link Layer Discovery Protocol (LLDP) is a vendor-neutral link layer protocol used by network devices for advertising their identity, capabilities, and neighbors on an IEEE 802 local area network, usually with Ethernet standard. Compared to Cisco Discovery Protocol (CDP) it’s not proprietary and can be used from different vendors. VMware vSphere adds LLDP capability in the Distribuited Virtual Switches (DVS). CDP it’s also available both in DVS, but also in standard virtual switches (by default it’s enabled in listen mode).

DellTechnologies, VMware

Livello di compatibilità di un cluster VMware

26 Settembre 2017
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Reading Time: 2 minutesIn un’infrastruttura basata su VMware vSphere il concetto di compatibilità si applica normalmente alle macchine virtuali in relazione a quale versione minima di vSphere richiedono per il loro funzionamento. Il livello è definito dalla versione di virtual hardware (che dal punto di vista numerico segue le numerazioni di VMware Workstation): quando si crea una nuova macchina virtuale il livello di default dipende da diversi fattori, quali la versione di vSphere utilizzata, il tipo di client (ad esempio il vecchio vSphere Client per Windows non chiede la versione, nel wizard di default), ma anche da come è stato […]

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