B1ms by Microsoft Azure

B1ms is a BS family [Memory Intensive] [Premium Storage capable] [Intel processor] 1 vCPU server offered by Microsoft Azure with 1 vCPUs, 2 GiB of memory and 4 GB of storage. The pricing starts at 0.0207 USD per hour.
1 vCPU
2 GiB Memory
4 GB Storage
Spare SCore
1,225
(All-cores)
1,225
(Single-core)

Specifications

Server Metadata

Vendor ID
azure
Server ID
Standard_B1ms
Name
B1ms
API Reference
Standard_B1ms
Description
BS family [Memory Intensive] [Premium Storage capable] [Intel processor] 1 vCPU
Family
BS
Hw Virt
Average Time To Start
27
Status
planned-for-retirement
Observed At
2026-10-28T11:05:25.879524

Availability

REGION / IDSPOTONDEMAND
East US (US) / eastus
- 0.0207 USD/h
West US 2 (US) / westus2
- 0.0207 USD/h
West US 3 (US) / westus3
- 0.0207 USD/h
East US 2 (US) / eastus2
- 0.0208 USD/h
North Central US (US) / northcentralus
- 0.0208 USD/h
Sweden Central (SE) / swedencentral
- 0.0216 USD/h
Central India (IN) / centralindia
- 0.0224 USD/h
Jio India Central (IN) / jioindiacentral
- 0.0224 USD/h
Jio India West (IN) / jioindiawest
- 0.0224 USD/h
North Europe (IE) / northeurope
- 0.0227 USD/h
Mexico Central (ZA) / mexicocentral
- 0.0229 USD/h
Spain Central (ES) / spaincentral
- 0.0229 USD/h
Canada Central (CA) / canadacentral
- 0.023 USD/h
Canada East (CA) / canadaeast
- 0.0232 USD/h
UK West (GB) / ukwest
- 0.0235 USD/h
France Central (FR) / francecentral
- 0.0236 USD/h
UK South (GB) / uksouth
- 0.0236 USD/h
Indonesia Central (ID) / indonesiacentral
- 0.0238 USD/h
Malaysia West (MY) / malaysiawest
- 0.0238 USD/h
Austria East (AT) / austriaeast
- 0.024 USD/h
Belgium Central (BE) / belgiumcentral
- 0.024 USD/h
Germany West Central (DE) / germanywestcentral
- 0.024 USD/h
Israel Central (IL) / israelcentral
- 0.024 USD/h
Italy North (IT) / italynorth
- 0.024 USD/h
Poland Central (PL) / polandcentral
- 0.024 USD/h
West Europe (NL) / westeurope
- 0.024 USD/h
West US (US) / westus
- 0.0248 USD/h
Central US (US) / centralus
- 0.025 USD/h
South Central US (US) / southcentralus
- 0.025 USD/h
UAE North (AE) / uaenorth
- 0.025 USD/h
West Central US (US) / westcentralus
- 0.025 USD/h
Qatar Central (QA) / qatarcentral
- 0.0251 USD/h
Korea Central (KR) / koreacentral
- 0.026 USD/h
Korea South (KR) / koreasouth
- 0.026 USD/h
Australia Central (AU) / australiacentral
- 0.0264 USD/h
Australia Central 2 (AU) / australiacentral2
- 0.0264 USD/h
Australia East (AU) / australiaeast
- 0.0264 USD/h
Australia Southeast (AU) / australiasoutheast
- 0.0264 USD/h
Norway East (NO) / norwayeast
- 0.0264 USD/h
Southeast Asia (SG) / southeastasia
- 0.0264 USD/h
Switzerland North (CH) / switzerlandnorth
- 0.0264 USD/h
South Africa North (ZA) / southafricanorth
- 0.0271 USD/h
Japan East (JP) / japaneast
- 0.0272 USD/h
New Zealand North (NZ) / newzealandnorth
- 0.0277 USD/h
Chile Central (CL) / chilecentral
- 0.0291 USD/h
East Asia (HK) / eastasia
- 0.0292 USD/h
South India (IN) / southindia
- 0.0294 USD/h
Japan West (JP) / japanwest
- 0.03 USD/h
West India (IN) / westindia
- 0.03 USD/h
Germany North (DE) / germanynorth
- 0.0312 USD/h
UAE Central (AE) / uaecentral
- 0.0312 USD/h
Brazil South (BR) / brazilsouth
- 0.0336 USD/h
France South (FR) / francesouth
- 0.0338 USD/h
South Africa West (ZA) / southafricawest
- 0.0339 USD/h
Norway West (NO) / norwaywest
- 0.0343 USD/h
Switzerland West (CH) / switzerlandwest
- 0.0343 USD/h
Brazil Southeast (US) / brazilsoutheast
- 0.0437 USD/h

Processor

vCPUs
1
Hypervisor
Microsoft Hyper-V
CPU Allocation
Burstable
CPU Cores
1
CPU Speed
2.6 GHz
CPU Architecture
x86_64
CPU Manufacturer
Intel
CPU Family
Xeon
CPU Model
8171M
CPU L1D Cache
32 KiB
CPU L1D Cache Total
32 KiB
CPU L1I Cache
32 KiB
CPU L1I Cache Total
32 KiB
CPU L2 Cache
256 KiB
CPU L2 Cache Total
256 KiB
CPU L3 Cache
50 MiB
CPU L3 Cache Total
50 MiB
CPU Flags
fpu, vme, de, pse, tsc, msr, pae, mce, cx8, apic, sep, mtrr, pge, mca, cmov, pat, pse36, clflush, mmx, fxsr, sse, sse2, ss, syscall, nx, pdpe1gb, rdtscp, lm, constant_tsc, rep_good, nopl, xtopology, cpuid, pni, pclmulqdq, ssse3, fma, cx16, pcid, sse4_1, sse4_2, movbe, popcnt, aes, xsave, avx, f16c, rdrand, hypervisor, lahf_lm, abm, 3dnowprefetch, pti, fsgsbase, bmi1, hle, avx2, smep, bmi2, erms, invpcid, rtm, avx512f, avx512dq, rdseed, adx, smap, clflushopt, avx512cd, avx512bw, avx512vl, xsaveopt, xsavec, xsaves, md_clear
Ecpus
1
Scalability
100

System Resources and Accelerators

MEMORY
Memory Amount
2 GiB
Memory Amount Actual
2 GiB
ACCELERATORS
Accelerator Count
0
Accelerator Memory Min
0 MiB
Accelerator Memory Total
0 MiB
Accelerators
    STORAGE
    Storage Size
    4 GB
    Storage Type
    ssd
    Storages
    • 4 GB ssd (temp disk)
    NETWORK
    Inbound Traffic
    0 GB/month
    Outbound Traffic
    0 GB/month
    IPv4
    0

    CPU and System Topology

    Server Description

    A budget-friendly burstable instance with a single vCPU and modest memory, designed for lightweight development and intermittent workloads.

    Burstable & BudgetGeneral Purpose

    Microsoft Azure B1ms is a burstable virtual machine from the BS family, utilizing the Microsoft Hyper-V hypervisor. It is configured with a single vCPU on an Intel Xeon 8171M processor running at 2.6 GHz, paired with 2.0 GB of RAM and 4 GB of local storage. Designed with a burstable CPU allocation model, this instance is engineered for low-intensity workloads that experience occasional spikes in activity. Benchmark results place its performance in the lower tier, with a Passmark CPU score of 1459.16 and a static web serving throughput of 1.47 GB/sec. The primary tradeoff is its limited processing power and memory capacity, making it highly cost-efficient for lightweight tasks but unsuitable for sustained high-performance computing. It is best utilized for development environments, small static web servers, and minor database operations.

    Economics

    Average Price per Region

    Prices per Zone

    Lowest Prices

    Performance

    Workload Profiles

    0.11Score
    Precomputed compound score for Cache Intensive workloads. A weighted average (geometric mean) of benchmark scores compared to their medians: score = ∏ (x_i / m_i)^(w_i / Σw). The score of 1.0 represents a synthetic baseline server with the median performance of each component benchmark; 0.5 means roughly half the performance; and 2.0 means twice the performance of that reference profile. Component weights: 50% Redis RPS (pipeline=1, SET), 20% Redis RPS (pipeline=16, SET), 10% PassMark Memory Mark (composite), 10% Memory bandwidth (read, 16 MB ~ L3), 10% PassMark single-thread CPU. Rationale for component selection: In-memory key-value store workload, mixing direct Redis performance metrics with memory speed and latency benchmarks, and single-core CPU performance profiles.
    Component Score Weight Impact
    Raw Reference Normalized Target Actual
    Redis RPS (pipeline=1, SET) 128,392 ops/sec 1,919,289 ops/sec 0.068 50.00% 50.00% -74.00%
    Redis RPS (pipeline=16, SET) 826,189 ops/sec 11,728,058 ops/sec 0.069 20.00% 20.00% -41.00%
    PassMark Memory Mark (composite) 920 2,416 0.38 10.00% 10.00% -9.20%
    Memory bandwidth (read, 16 MB ~ L3) 22,187 MB/sec 108,466 MB/sec 0.2 10.00% 10.00% -15.00%
    PassMark single-thread CPU 1,645 Mops/s 2,365 Mops/s 0.67 10.00% 10.00% -3.90%

    Memory Bandwidth

    Compression

    OpenSSL

    Passmark CPU Scores

    BENCHMARKSCORE
    Mark
    		 1,459
    Compression
    		 16,911
    Encryption
    		 454
    Extended Instructions
    		 1,402
    Floating Point Maths
    		 3,025
    Integer Maths
    		 3,543
    Physics
    		 197
    Prime Numbers
    		 11
    Single Threaded
    		 1,645
    String Sorting
    		 2,129

    Passmark Memory Scores

    BENCHMARKSCORE
    Memory Mark
    		 920
    Database Operations
    		 624
    Memory Latency
    		 53
    Memory Read Cached
    		 21,154
    Memory Read Uncached
    		 9,835
    Memory Write
    		 9,164

    Stress-ng Stressors

    CPU integerSingleMultiScaling
    atomic
    		 408.75 408.75 1.00×
    bitops
    		 79,164 79,164 1.00×
    branch
    		 102,785 102,785 1.00×
    funccall
    		 347.21 347.21 1.00×
    funcret
    		 6,796 6,796 1.00×
    hash
    		 83,781 83,781 1.00×
    intmath
    		 14,209 14,209 1.00×
    nop
    		 119,512 119,512 1.00×
    prime
    		 206,845 206,845 1.00×
    rotate
    		 64,454 64,454 1.00×
    str
    		 435,607 435,607 1.00×
    wcs
    		 294,118 294,118 1.00×
    CryptographySingleMultiScaling
    crypt
    		 1,535 1,535 1.00×
    CompressionSingleMultiScaling
    jpeg
    		 350.05 350.05 1.00×
    zlib
    		 39.74 39.74 1.00×
    HypervisorSingleMultiScaling
    clock
    		 12,646 12,646 1.00×
    clone
    		 342.29 342.29 1.00×
    context
    		 1,306 1,306 1.00×
    cpu-sched
    		 59.72 59.72 1.00×
    eventfd
    		 54,303 54,303 1.00×
    fault
    		 5,145 5,145 1.00×
    fork
    		 3,154 3,154 1.00×
    getrandom
    		 29,016 29,016 1.00×
    hrtimers
    		 86,974 86,974 1.00×
    mprotect
    		 173,115 173,115 1.00×
    mtx
    		 34,922,542 34,922,542 1.00×
    munmap
    		 1,969 1,969 1.00×
    null
    		 135,671 135,671 1.00×
    pipe
    		 359,888 359,888 1.00×
    priv-instr
    		 313,918 313,918 1.00×
    resched
    		 15,089 15,089 1.00×
    switch
    		 143,889 143,889 1.00×
    timermix
    		 118,623 118,623 1.00×
    tlb-shootdown
    		 2,545 2,545 1.00×
    tsc
    		 664,095 664,095 1.00×
    usersyscall
    		 207,663 207,663 1.00×
    vdso
    		 51,994,496 51,994,496 1.00×
    vfork
    		 25,653 25,653 1.00×
    x86syscall
    		 1,565,046 1,565,046 1.00×
    yield
    		 478,342 478,342 1.00×
    zero
    		 1,020,957 1,020,957 1.00×
    CPU float/SIMDSingleMultiScaling
    eigen
    		 9,589 9,589 1.00×
    expmath
    		 1,739 1,739 1.00×
    fma
    		 406,623 406,623 1.00×
    fp
    		 81.6 81.6 1.00×
    fractal
    		 3.6 3.6 1.00×
    hyperbolic
    		 1,925 1,925 1.00×
    logmath
    		 3,008 3,008 1.00×
    matrix
    		 2,501 2,501 1.00×
    matrix-3d
    		 486.06 486.06 1.00×
    monte-carlo
    		 74.44 74.44 1.00×
    mpfr
    		 757.62 757.62 1.00×
    powmath
    		 1,074 1,074 1.00×
    trig
    		 1,228 1,228 1.00×
    veccmp
    		 9,078 9,078 1.00×
    vecfp
    		 577.44 577.44 1.00×
    vecmath
    		 1,457 1,457 1.00×
    vecshuf
    		 366.18 366.18 1.00×
    vecwide
    		 16,374 16,374 1.00×
    AlgorithmsSingleMultiScaling
    bitonicsort
    		 4.8 4.8 1.00×
    bsearch
    		 151.56 151.56 1.00×
    bubblesort
    		 0.4 0.4 1.00×
    fibsearch
    		 178.88 178.88 1.00×
    heapsort
    		 5.2 5.2 1.00×
    hsearch
    		 2,873 2,873 1.00×
    insertionsort
    		 5.2 5.2 1.00×
    malloc
    		 1,077,932 1,077,932 1.00×
    mcontend
    		 215.8 215.8 1.00×
    mergesort
    		 17.2 17.2 1.00×
    qsort
    		 12 12 1.00×
    skiplist
    		 3,817 3,817 1.00×
    tree
    		 0.8 0.8 1.00×
    MemorySingleMultiScaling
    cache
    		 144,451 144,451 1.00×
    cachehammer
    		 385,935 385,935 1.00×
    cacheline
    		 10.66 10.66 1.00×
    l1cache
    		 127.07 127.07 1.00×
    memcpy
    		 282.94 282.94 1.00×
    memrate
    		 0.78 0.78 1.00×
    memthrash
    		 43.25 43.25 1.00×
    ptr-chase
    		 12,223,900 12,223,900 1.00×
    spinmem
    		 0.4 0.4 1.00×
    stream
    		 22.7 22.7 1.00×
    vm
    		 29,717 29,717 1.00×

    LLM Inference Speed for Prompt Processing

    LLM Inference Speed for Text Generation

    Static Web Server

    Redis

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    B1ms FAQs